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Work Energy

The document is a quiz consisting of 10 questions related to work, energy, and power concepts. It covers topics such as gravitational force, kinetic energy, potential energy, and the relationship between work and power. Each question provides multiple-choice answers for students to select from.

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19 views1 page

Work Energy

The document is a quiz consisting of 10 questions related to work, energy, and power concepts. It covers topics such as gravitational force, kinetic energy, potential energy, and the relationship between work and power. Each question provides multiple-choice answers for students to select from.

Uploaded by

studyv807
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Work Energy & Power - 9th Quiz

1. When a body falls freely towards the earth, then its total energy -:
(a) increases (b) decreases (c) remains constant (d) first increases then decreases
2. The work done on an object does not depend upon the –:
(a) displacement (b) force applied (c) angle between force and displacement
(d) initial velocity of the object
3. Moon revolves around the earth due to gravitational force (F) of earth on moon. The work
done by the gravitational force is (r = radius of the circular orbit of moon)-:
(a) F.2Pir (b) F.Pir (c) zero (d) negative work
4. The number of joules contained in 1 kWh is -:
(a) 36 x 105 J (b) 3.6 x 107 J (c) 36 x 108 J (d) 3.7 x 107 J
5. An iron sphere of mass 10 kg has the same diameter as an aluminum sphere of mass is
3.5 kg. Both spheres are dropped simultaneously from a tower. When they are Io m above
the ground, they have the same.
(a) acceleration (b) momenta (c) potential energy (d) kinetic energy
6. If speed of a car becomes 2 times, its kinetic energy becomes -:
(a) 4 times (b) 8 times (c) 16 times (d) 12 times
7. If work is done at a Faster rate, then -:
(a) power is more (b) No power is required to do work (c) power is less (d) Infinite
power is required
8. A flying airplane possesses –:
(a)Only potential energy (b) Only kinetic energy (c) Both potential and kinetic energy
(d) None of these
9. One-joule work is said to be done when -:
(a) a force of 1 N displaces a body by 1 cm (b) a force of 1 N displaces a body by l m
(c) a force of 1 dyne displaces a body by 1m (d) a force of 1 dyne displace a body by 1cm
10. The energy possessed by an oscillating pendulum OF a clock is -:
(a) kinetic energy (b) potential energy (c) restoring energy (d) mechanical energy

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