Test No.
Syllabus
PHYSICS
Consider a process shown in the figure. During this process the work done by the system
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a. Continuously increases c. First increases, then decreases
b. Continuously decreases d. First decreases, then increase
Which of the following expressions does not have the units equal to joule? Where ‘P' is the linear momentum
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and 'm' is the mass of the object moving with velocity 'v'.
a. Fv c. Fd
2
b.
P d. mv2
2m
A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m which
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applying the force and the ball goes up to 2 m height further, find the magnitude of the force. Consider g = 10
m/s2
a. 22 N c. 20 N
b. 16 N d. 4N
Q.126 A car accelerates up a hill what happens to its K.E and to its P.E respectively.
a. K.E increases, P.E decreases c. K.E increases, P.E increases
b. K.E decreases, P.E increases d. K.E decreases, P.E decreases
The potential energy of a system is represented in the first figure, the force acting on the system will be
represented by
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a. c.
b. d.
Q.128 If a body raised up from the earth's surface, the work done equal to change in the:
a. Gravitational P.E c. Air resistance
b. K.E d. Elastic P.E
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How much water a pump of 2 kW can raise in one minute to a height of 10 m (Take g= 10 ms-2)
a. 1000 liters c. 100 liters
b. 1200 liters d. 2000 liters
A horse pulls a wagon with a force of 360 N at an angle of 60° with the horizontal at a speed of 10 km h-1. The
Q.130 power of the horse is
a. 1000 W c. 500 W
b. 2000 W d. 750 W
A bucket full of water having mass of 1000 kg is taken upto height of 10m in 10 seconds. What is the power
developed?
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a. 1000 W c. 100 kW
b. 10 kW d. 1000 kW
Two men with weights in the ratio 5 : 3 run up a staircase (of same height) in times in the ratio 11 : 9. The ratio of
Q.132 power of first to that of second is:
a. 11/15 c. 15/11
b. 11/9 d. 9/11
A automobile travelling with a speed of 60 km h can brake to stop within a distance of 20 m. If the car is going
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twice as fast i.e., 120 km h, the stopping distance will be
a. 60 m c. 40 m
b. 20 m d. 80 m
Block and tackle system of pulleys is used to raise a load of 500N through a height of 20 m. The work done
Q.134 against friction is 2000J. Calculate the work done by the effort.
a. 10000 J c. 15000 J
b. 12000 J d. 5000 J
Q.135 Which of the followings is an example of work done against gravitational force?
a. Getting up with the stairs c. Get down with the stairs
b. Walking on the flat ground d. Dropping any object down from the top
Q.136 Electron, proton, deuterium and a-particle have same K.E. Which of them has highest momentum?
a. a-particle c. Deuterium
b. Proton d. Electron
Q.137 If K.E of two particles is in ratio 2:1 and their momentum in ratio 4:1. What is the ratio of their masses:
a. 2:1 c. 8:1
b. 1:2 d. 1:8
The input power to a motor is 300 W. In 20s it lifts a load of 400 N through a height of 6.0 m. What is the
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efficiency of the motor?
a. 12% c. 25%
b. 40% d. 75%
A small motor has an input power rating of 10W and is run for 5.0 minutes. What is the electrical energy input to
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the motor in this time?
a. 20 J c. 300 J
b. 50 J d. 3000 J
A toy car moves of mass 5kg up a ramp under the influence of force F plotted against displacement. The
maximum height attained is given by:
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a. ymax= 20m c. Y max = 15m
b. Ymax = 11m d. Ymx = 5m
A person of mass 60kg carries a 15kg body on the top of building 10m high in 5 minutes. He puts a power in
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carrying the body.
a. 10W c. 5W
b. 30W d. 15W
Q.142 In a simple pendulum work done by the tension force is
a. Positive c. Zero
b. Negative d. None
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If the increase in the kinetic energy of a body is 22% , then the increase in
the momentum will be:
a. 0.22 c. 0.44
b. 0.1 d. 1
A moves with 65 km/h while B is coming back of A with 80 km/h. The relative velocity of B with respect to.
Q.144 A is A. 80 km/h B. 60 km/h C. 15 km/h D. 145 km/h
a. c.
b. d.
A car travels equal distance in the same direction with velocities 60 km h -1, 20 km h1 and 10 km h-respectively.
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The average velocity of the car over the whole journey of motion is:
a. 8 m/s c. 7 m/s
b. 6 m/s d. 5 m/s
To convert given displacement-time graph into distance time graph,
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The corresponding distance time graph will be:
a. c.
b. d.
Q.147 If d-t curve is a straight line, it shows that body is:
a. Average velocity c. Instantaneous velocity
b. Uniform velocity d. Both '(a)' and '(b)
A constant force F changes the velocity of a 80kg sprinter from 3ms-1 to 4ms-1 in 0.5 sec. The acceleration of
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sprinter will be:
a. 1.5ms-2 c. 2.0 ms-2
b. 2.5 ms-2 d. 3.0 ms-2
Q.149 A ball is projected upwards with an initial velocity as shown in the figure. It comes back after sometime and
strikes ground with the same velocity but pointing downward. What is the angle between acceleration when
moving upward to acceleration coming down?
a. 180° c. 60°
b. 90° d. 0°
Q.150 A passenger in a moving train tosses a coin. If the coin falls behind him, the train must be moving with:
a. An acceleration c. A uniform speed
b. A deceleration d. Any of the above
A batsman hits a sixer and the ball reaches out of the cricket ground. Which of the following graphs describes
Q.151 the variation of the cricket ball's vertical velocity v with time between the time of hitting the bat and time (the
time of touching the ground)
a. c.
b. d.
Q.152 In which of the following cases forces may not be required to keep the.
a. Particle going in a circle c. The momentum of the particle constant
b. Particle going along a straight line d. Acceleration of the particle constant
A billiard ball moving with a speed of 5 m/s collide with an identical ball, originally at rest. If first ball stops dead
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after the collision, then second ball will move forward with speed of
a. 10 m/s c. 2.5 m/s
b. 5 m/s d. 9 m/s
Q.154 A ball of mass 2 kg travelling at 8 ms-1 strikes a ball of mass 4 kg travelling at 2 ms-1. Both balls are moving along
the same straight line as shown
After collision, both balls move at the same velocity v. What is the magnitude of the velocity v?
a. 4 ms-1 c. 6 ms-1
b. 5 ms-1 d. 8 ms-1
Two similar spheres, each of mass m and travelling with speed v, are moving towards each other.
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The spheres have a head on elastic collision. Which statement is correct?
The total kinetic energy before impact is
a. The spheres stick together on impact c.
zero
b. The total kinetic energy after impact is mv2 d. The total momentum before impact is 2 mv
A ball is projected horizontally from the top of a cliff on the surface of the earth with a speed of 40ms 1.
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Assuming that there is no air resistance, what will its speed be 3 s later?
a. 30ms-1 c. 50ms-1
b. 40ms-1 d. 60ms-1
A particle moves from A to B and then it moves from B to C as shown in figure. Calculate the ratio between path
length and displacement.
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a. 2 c. ½
b. 1 d. Infinity
Q.158 If R is the max range of projectile, then greatest height attained is
a. R c. R/4
b. R/1 d. 2R
The range of a particle when launched at an angle of 150 with the horizontal is 1.5 km. what is the range of
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projectile when launched at an angle of 45° to the horizontal:
a. 1.5 km c. 6.0 km
b. 3.0 km d. 0.75 km
Table shows how the velocity of a motor cyclist changed during speed trial along straight road.
Velocity/ms-1 0 15 30 20 10 0
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Time/s 0 5 10 15 25 30
draw V-t graph for this motion?
a. c.
b. d.
Projectile is launched with vertical Kinetic energy K at angle θ then its variation
Q.161 with kinetic energy Ko is
a. periodic c. Parabolic
b. Linear d. Hyperbolic trajectory
Q.162 Acceleration of rolling object is zero at _________ point of hill:
a. Lowest c. Highest
b. Middle d. None
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A straight moving bus takes a sharp right turn. What will happen to the
passengers sitting inside the bus?
a. They will stay the way they were c. They will tilt leftwards
b. They will start jumping d. They will tilt rightwards
Q.164 The ratio of angular speeds of minute hand and hour hand of a watch is:
a. 6:1 c. 12:1
b. 1:12 d. 1:6
A communication satellite takes 24 hours to orbit earth is replaced by new satellite which has twice mass of first. If
Q.165 redius of orbit of new satellite
new satellite also has an orbit time 24 hours, then ratio radius of
radius of orbit old satellite
a. 1;2 c. 1:1
b. √ 2:1 d. 2:1
A boy angrily throws ring from the top of a building 12 m high towards his friend with an initial horizontal speed of
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5 ms-l; the speed with which the ring touches the ground is
a. 5 m/s c. 1.5 m/s
b. 14.3 m/s d. 16.2 m/s
What is outward force acting on a mass of 10 kg when rotating at one end on an inelastic string 10m long at speed
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of 1m/s?
a. 1N c. 2N
b. 10 N d. 100 N
One end of the string of length 1.0 m is tied to a body of mass 0.5 kg. It is whirled in a vertical circle as shown in
figure below. If the angular frequency of the body is 4 rad s-1, what is the tension in the string when the body is at
the topmost point A? Take g = 10 ms-2.
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a. 3N c. 13 N
b. 15 N d. 18 N
Q.169 Determine the angular velocity if 4.8 revolutions are completed in 4 secondsa
a. 9.6 radians/sec c. 8 radians/sec
b. 7.5 radians/sec d. 0.96 radians/sec
Q.170 The centripetal force direction is positive when object rotate
a. Anti-clockwise c. upward
b. clockwise d. None
A wheel whose radius is 50 cm rotates at an angular velocity of 6 rad/sec. The
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linear velocity of the rim of the wheel is closest to
a. 1.5 m/s c. 3.0 m/s
b. 4.5 m/s d. 7.5 m/s
Q1.72 For constant linear acceleration, angular acceleration and radius are
a. Equal c. Directly related
b. Inversely related d. No relation
Determine the linear velocity of a point rotating at an angular velocity of 12 π
Q.173 radians per second at a distance of 8 centimeters from the center of the rotating
object.
a. 31.6 cm/s c. 30.6 cm/s
b. 301.6 cm/s d. 3016 cm/s
Q.174 A particle is performing uniform circular motion has constant:
a. Velocity c. Position
b. Acceleration d. Momentum
When brakes of a car are applied, angular velocity of a flywheel reduces from 900
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cycles/min to 720 cycle/min in 6sec. Angular retardation
a. π rads-2 c. 8π rad/s2
b. 9π rad/s2 d. None
Q.176 The angular acceleration is maximum when:
a. r=maximum c. r=1
b. r=0 d. none of these
