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# Work, Energy and Power Test Online MCQs

 Test Name Work, Energy and Power MCQs Test Subject Physics Test Type MCQs Total Question 15 Total Marks 30 Total Time 15 Mints Test Help For Physics Subject Test Prep. All Admissions Test. All Jobs Test prep. Engineering Test prep. B Tech and BDS Prep.

Work, Power and Energy Test being added over here in  the form of multiple choice questions for the preparation of Physics Subject test. Work, Power and Energy Test is helpful in objective exam preparation. Check your information and increase your knowledge about Work, Power and Energy by attempting this test below.

## Physics

1. If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbines, is (take g = 9.8 m/s²)

Question 1 of 15

2. A particle of mass 10 g is kept on the surface of a uniform sphere of mass 100 Kg and radius 10 cm. Find the work to be done against the gravitational force between them to take the particle far away from the sphere (you may take G = 6.67 x 10⁻¹¹ Nm² /kg²)

Question 2 of 15

3. A vertical spring with force constant k is fixed on a table. A ball of mass m at a height h above the free upper end of the spring falls vertically on the spring so that the spring is compressed by a distance d. The net work done in the process is

Question 3 of 15

4. A body of mass 5 kg has momentum of 10 kg m/sec. When a force of 0.2 N is applied on it for 10 sec, the change in its kinetic energy is

Question 4 of 15

5. A spring 40 mm long is stretched by applying a force. If 10 N force is required to stretch the spring through one mm, then work done in stretching the spring through 40 mm is:

Question 5 of 15

6. A block of mass 10 kg is moving in x-direction with a constant speed of 10 m/sec. It is subjected to a retarding force F = -0. 1x joule/meter during its travel from x = 20 meter to x = 30 meter. Its final kinetic energy will be:

Question 6 of 15

7. If the kinetic energy of the body becomes four times of its initial value, then the new momentum will

Question 7 of 15

8. If the force applied is F and the velocity gained is v, then the power developed is:

Question 8 of 15

9. The kinetic energy of a body becomes four times its initial value. The new linear momentum will be

Question 9 of 15

10. A ball loses 15.0% of its kinetic energy when it bounces back from a concrete wall. With what speed you must throw it vertically down from a height of 12.4 m to have it bounce back to the same height (ignore air resistance)?

Question 10 of 15

11. If the water falls from a dam into a turbine wheel 19.5 m below, then the velocity of water at the turbine is: (take g = 9.8 m/sec²)

Question 11 of 15

12. A bullet is fired form a riffle. If the riffle recoils freely, then the kinetic energy of the rifle will be:

Question 12 of 15

13. A body is allowed to slide down a frictionless track freely under gravity. The track end in a semicircular shaped part of a diameter D. The height (minimum) from which the body must fall so that it completes the circle, is

Question 13 of 15

14. A shell of mass m moving with velocity v suddenly breaks into 2 pieces. The part having mass m/3 remains stationary. The velocity of other part will be:

Question 14 of 15

15. When a ball is thrown up vertically with velocity v₀ it reaches a maximum height of h. If one wishes to triple the maximum height then the ball should be thrown with velocity?

Question 15 of 15

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