GRADE 12 PHYSICS WORK SHEET-2 TWO DIMENSIONAL MOTION

MANA BARUMSAA MAKKOO BILLII

MAKKO BILLI SCHOOL
መኮቢሊ ት/ቤት
0221120620 Casher office, 0221120621 secretary office, 02221106031main campus KG school, 0221125803 main campus elementary school,
0222119848 main campus high school 0222121984 branch campus

CHOOSE THE BEST ANSWER FOR THE FOLLOWING QUESTIONS

1. Identify the CORRECT statement about horizontal projectile motion:
A. The initial vertical component of velocity is zero.
B. The horizontal component of velocity is constant.
C. The vertical component of displacement at any time t is ( ) =

D. The maximum horizontal component of projectile (Range) is =

2. A ball is thrown horizontally with a velocity of 20m/s from a top of building 90 m high. What are
the time taken to reach the ground and the horizontal displacement?
A. 5.5sec, 84m C. 4.2sec, 20m
B. 4.2sec, 84m D. 2.5sec, 50m
3. A rifle is aimed horizontally at a target 45m away as shown in Figure below. The bullet hits the
target 5cm below the aiming point. What is the bullet’s time of flight and the initial velocity of the
bullet respectively?
A. 0.2sec , 450m/s
B. 0.1sec, 500m/s
C. 0.1sec, 450m/s
D. 0.2sec, 500m/s
4. A rescue airplane travelling at 360 km/h horizontally drops a food package from a height of 300 m
when it passes over a car driver stranded in the desert. Assuming g=10m/s2. How long will it take
the food package to reach the ground and how far from the car driver should the food package be
dropped respectively?
A. 774sec and 7.74m C. 750sec and 8.5m
B. 7.74sec and 774m D. 8.5sec and 750m
5. A gun with a muzzle velocity of 500 m/s shoots a bullet at a target 50 m away. To hit the target the
gun should be aimed:
A. Directly towards the target along the line joining the gun and target.
B. 10 cm high above the target.
C. 5 cm high above the target.
D. 5cm below the target.

Visit us on www.makkobillischool.com or like us on facebook.com/makkobilli school. Page 1

GRADE 12 PHYSICS WORK SHEET-2 TWO DIMENSIONAL MOTION

6. One ball is thrown horizontally. At the same time, a second ball is dropped from the same height.
Ignoring air resistance and assuming the ground is level, which ball hits the ground first?
A. The one that is dropped from the height. C. Both hit the ground at the same time
B. The one that is thrown horizontally D. Undetermined
7. A marble is to be thrown horizontally from a height of 19.6m above the ground so that it hits
another marble on the ground 2m away. At what velocity the marble thrown?
A. 5m/s B. 10m/s C. 15m/s D. 20m/s
8. A plane flying horizontally at 98m/s releases an object which reaches the ground in 10 second. The
angle made by the velocity of the object with horizontal at the time of impact is:
A. 300 B. 450 C. 600 D. 750
9. Which one of the following is TRUE about projectile at an angle (inclined projectile)?
A. The horizontal component of acceleration of projectile is constant.
B. The vertical component of acceleration is equal to zero.
C. The vertical component of velocity is constant at each point on the trajectory.
D. The horizontal component of velocity is constant at each point on the trajectory.
10. The range of prectile will be maximum at____________ angle of projection.
A. 900 B. 450 C. 300 D. 600
11. Which of the following statement is TRUE about projectile motion?
A. The horizontal and vertical components of a projectile are dependent on each other.
B. In the absence of air resistance, the horizontal motion of the projectile is uniform motion while,
the vertical motion of the projectile is a uniformly accelerated motion.
C. Projectile motion is formed in the interval of angle of projection ≤ ≤
D. Projectile motion is formed in interval of angle of projection < <
12. A ball is kicked from the ground with an initial speed of 25 m/s at an angle of 530 above the
horizontal directly toward a wall, as shown in Figure below. The wall is 24m from the release
point of the ball. How long does the ball take to reach the wall and How far above the ground level
does the ball hit the wall respectively?
A. 19.6sec, 1.6m
B. 1.6sec, 19.6m
C. 12.5sec, 2.5m
D. 2.5sec, 12.5m
13. Based on question number 12, what are the horizontal and vertical components of its velocity as it
hits the wall respectively?

Visit us on www.makkobillischool.com or like us on facebook.com/makkobilli school. Page 2

GRADE 12 PHYSICS WORK SHEET-2 TWO DIMENSIONAL MOTION

A. 15m/s and 4m/s C. 10m/s and 25m/s

B. 4m/s and 15m/s D. 25m/s and 10m/s
14. Which of the following statements about projectile motion are true? (Ignoring air resistance).
A. The horizontal and vertical motions are independent.
B. The force on the projectile is constant throughout the flight.
C. The acceleration of the projectile is constant throughout the flight.
D. The path depends upon the initial velocity, but not upon the mass of the projectile.
E. All of the above statements are true.
15. If a long distance jumper athlete leaves the ground at an angle 37 above the horizontal at a speed
of 10m/s , how far does he jump in the horizontal direction? (use: 10 m⁄s )
A. 4.8m B. 6m C. 9.6m D.12m
16. A projectile is fired on Earth with some initial velocity. Another projectile is fired from the surface
of the Moon with the same initial velocity. If air resistance is ignored, which projectile has the
greater range? (Note that the free-fall acceleration on the Moon is about 1.6 m/s2).
A. The one fired from the surface of the Moon C. both projectile has equal range
B. The one fired from the surface of the Earth D. undetermined
17. Two projectile P and Q are thrown with the same speed, but at angles of 400 and 500 with the
horizontal respectively. The range of P will be:
A. Equal to that of Q C. Greater than that of Q
B. Less than that of Q D. ¾ times that of Q
18. A projectile is fired in such a way that its horizontal range is equal to three times its maximum
height. What is the angle of projection?
A. 300 B. 530 C. 600 D. 450
19. At which position in its flight will a ball experience its minimum speed during inclined projection?
A. At the beginning C. At the end
B. At maximum height D. The same speed at all positions
20. A ball is kicked into the air from the ground at an angle θ with the horizontal. When the ball
reaches its highest point, which statement is TRUE?
A. Both the velocity and acceleration of the ball are zero.
B. Its velocity is not zero, but its acceleration is zero.
C. Its velocity is perpendicular to its acceleration.
D. Its acceleration depends on the angle at which the ball was thrown.

Visit us on www.makkobillischool.com or like us on facebook.com/makkobilli school. Page 3

GRADE 12 PHYSICS WORK SHEET-2
SHEET TWO DIMENSIONAL MOTION

21. If the initial velocity of a projectile be doubled, keeping the angle of projection same, the
maximum height reached by it will be:
A. Halved B. Doubled C. Quadrupled D. Remain the same
by: ⃗ = (3i
22. The velocity of projection of an inclined projectile is given by:v ( + 2j)m/s. the speed of
projectile at the highest point of trajectory is:
A. 3m/s B. 2m/s C. 1m/s D. 5m/s
23. A long jumper leaves the ground at an angle of 200 above the horizontal and at a speed of 11.0 m/s.
How far does he jump in the horizontal direction and what is the maximum height reached
respectively?
A. 7.77m, 4.13m B. 4.13m, 7.77m C. 6.5m, 3.5m D. 8.5m, 4.5m
24. An object projected at an angle θ with velocity
locity 30 m/s reaches its maximum height in 1.5 s. what is
its range? A. 89.5m B. 34.5m C. 78.3m D. 45.5m
25. If the air resistance is ignored, then which one of the following factors not determines the
maximum
ximum height of projectile?
A. The velocity of projection C. Acceleration due to gravity
B. The angle of projection D. Mass of projectile
26. If the range of projectile at 45 is 20m, then
hen what is its maximum height at this angle?
A. 5m B. 4m C. 10m D. 20m
27. The launching speed of a certain projectile is five times the speed it has at its maximum height.
What is the elevation
ion angle at launching?
A. 78.460 B. 450 C. 370 D. 56.540
28. Three projectiles are fired from the ground level at equal speed but different angles. Fired at an
angles of 30 , 60 , 45 The projectile to hit the ground later will be the one fired at:
A. 60 degrees C. 45 degrees
B. 30 degrees D. The three projectiles are hit the ground at the same time.
pivoted at O. Three forces act on it in the directions shown: F1 = 10
29. The object in Figure below is pivoted
N at 3.0 m from O; F2
2 = 16 N at 4.0 m from O; and F3=
3= 19 N at 8.0 m from O. What is the net
torque about O?
A. 113.5N, Clockwise
B. 113.5N,Counterclockwise
C. 32N, Clockwise
D. 32N, Counterclockwise

Visit us on www.makkobillischool.com or like us on facebook.com/makkobilli school. Page 4

GRADE 12 PHYSICS WORK SHEET-2
SHEET TWO DIMENSIONAL MOTION

30. A motor capable of producing a constant torque 100 Nm and a maximum rotation speed of 150
rad/s is connected to a flywheel with rotational inertia 0.1 kgm2. What angular acceleration will the
flywheel experience as the motor is switched on?
A. 100rad/s2 B. 1000rad/s2 C. 10rad/s2 D. 10000rad/s2
31. Three particles are connected by rigid rods of negligible mass lying along the y-axis as shown in
Figure shown below. If the system rotates about the x-axis
axis with angular sspeed
of 2 rad/s, find the moment of inertia about the x-axis.
A. 132kgm2

B. 145kgm2

C. 164kgm2

D. 125kgm2

32. A disc with moment of inertia 2 kgm2 changes its angular speed from 3 rad/s to 8rad/s by a net
torque of 50 Nm. How long will the disc take to change its angular speed?
A. 0.5sec B. 0.25sec C. 0.45sec D. 0.75sec
33. A constant
nt torque of 400N turns a wheel of moment of inertia 100kgm
100 about an axis through its
center. The angular velocity gained in 4 second is?
A. 12rad/s B. 16rad/s C. 20rad/s D. 24rad/s
34. A force of 400
0 N is applied to a beam at a distance of 5 m from the pivot point, as shown in Figure
below. What is the magnitude of the torque which turns the bar around pivot.
A. 10N
B. 100N
C. 1000N
D. 10000N
35. Three point masses, each of mass m,, are placed at the corners of an equilateral triangle of side L.
Find the moment of inertia of the system about an axis passing through one of the corners
perpendicular to the plane of the triangle.
A. 3ML2 B. 4ML2 C. 2ML2 D. ML2
1.495x108 km. The
36. Earth has an orbital period of 365 days and its mean distance from the Sun is 1.495
5.896 9 km. what is Pluto’s orbital per
planet Pluto’s mean distance from the Sun is 5.896x10 period in Earth
days?
A. 9x1014days B. 9x1012days C. 9x1013days D. 9x1010days

Visit us on www.makkobillischool.com or like us on facebook.com/makkobilli school. Page 5

GRADE 12 PHYSICS WORK SHEET-2 TWO DIMENSIONAL MOTION

37. If Saturn is on average 9 times farther from the Sun than Earth is, what is this distance in Earth
years? A. 29 years B. 30 years C. 27 years D. 32 years
38. According to Kepler’s laws of planetary motion, a satellite increases its speed as it approaches the
Sun and decreases its speed as it moves away from the Sun. A. True B. False.
39. Titan, the largest moon of Saturn, has a mean orbital radius of 1.22x109
m. The orbital period of Titan is 15.95 days. Hyperion, another moon of Saturn, orbits at a mean
radius of 1.48x109 m. what is the orbital period of Hyperion in days.
A. 21.3 days B. 23.1 days C. 24.3 days D. 25.5 days
40. Given that the Moon orbits Earth every 27.3 days and that it is an average distance of 3.84x108 m
from the center of Earth, what is the period of an artificial satellite orbiting at an average altitude
of 1,500 km above Earth’s surface. (Radius of Earth is 6380 km.)
A. 0.672days B. 6.72days C. 67.2 days D. 672 days
41. The planet Mercury travels around the Sun with a mean orbital radius of 5.8x1010 m. The mass of
the Sun is 1.99x1030 kg. How long does it take Mercury to orbit the Sun in Earth days? A. 99
days B. 88.1 days C. 77days D. 65.2 days
42. How would the period of an object in a circular orbit change if the radius of the orbit doubled?
A. The period would increase by a factor of 2.
B. The period would decrease by a factor of 4.
C. The period would increase by a factor of 2√2.
D. The period would decrease by a factor of 2√2.
43. The gravitational force between a 60 kg man and Earth is not equal because Earth is more massive
than the man therefore, it exerts the greatest force. A. True B. False
44. A 10 kg mass and a 100 kg mass are 1 meter apart. What is the force of attraction
between them?
A. 6.67x108N B. 6.67x10-8N C. 6.67x10-7N D. 6.67x107N
45. Two objects are attracted to each other by a gravitational force F. If the distance between the
objects is doubled, what is the new gravitational force between the objects in terms of F?
A. 4 F B. 1/4F C. 16F D. 1/16F
46. Newton’s law of gravitation applies to:
A. Small bodies only. C. Plants only.
B. All bodies irrespective of their size. D. Moon and satellites only
47. Suppose the gravitational force between two spheres is 30 N. If the magnitude of each mass
doubles, what is the force between the masses?
A. 180N B. 120N C. 200N D. 140N

Visit us on www.makkobillischool.com or like us on facebook.com/makkobilli school. Page 6

GRADE 12 PHYSICS WORK SHEET-2 TWO DIMENSIONAL MOTION

48. What is the mass of the Sun, noting that the period of Earth’s orbit around the Sun is 3.156 x 107 s
and its distance from the Sun is 1.496 x 1011 m?
A. 1.989x1030kg B. 1.989x1032 kg C. 1.989x1028 kg D1.989x1025 kg
49. Two identical isolated particles, each of mass 2.00 kg, are separated by a distance of 30.0 cm.
What is the magnitude of the gravitational force exerted by one particle on the other?
A. 2.96x109N B. 2.96x10-9N C. 2.96x1010N D. 2.96x10-10N
50. If a person has a mass of 60.0 kg, what would be the force of gravitational attraction on him at
Earth’s surface?
A. 584N B. 654N C. 485N D. 786N
51. Which one of the following is FALSE about Newton’s law of universal gravitations?
A. The gravitational force between two bodies is inversely proportional to the separation between
them.
B. The gravitational force between two bodies is directly proportional to the product of the two
masses.
C. The gravitational force between the planets is repulsive force.
D. The gravitational force between the planets is attractive force.
52. A hypothetical planet has a mass of four times that of the Earth and radius of twice that of the
Earth. What is the acceleration due to gravity on the planet in terms of the acceleration on Earth?
A. The same as that of the earth C. Half of that of the earth
B. Four times that of the earth D. Three times that of the earth

By: Habtamu Alemu

Visit us on www.makkobillischool.com or like us on facebook.com/makkobilli school. Page 7