Work and Energy

MM

Mashaal Masha

Oct 12, 2022

Choose the correct options for the following questions.

A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. The amount of work done against friction is:

Difficulty: Easy

A:

5 \times 10^{1} J

B:

5 \times 10^{2} J

C:

5 \times 10^{3} J

D:

5 \times 10^{4} J

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

Difficulty: Easy

A:

0^{\circ}

B:

30^{\circ}

C:

60^{\circ}

D:

90^{\circ}