mechanics (mass, force, acceleration, work, energy, momentum, velocity) - Category wise Question and Answer Practice Test with Solutions

Question : 11 [UPPCS (Pre) 1994]

It is difficult to walk on the ice than on the road because

a) Ice does not offer any reaction when we push it with our foot

b) Road is harder than the ice

c) Ice is harder than the road

d) Ice has a lesser friction than the road

Question : 12

A gymnast takes turns with her arms and legs stretched. When she pulls her arms and legs

a) the angular velocity stays constant

b) the moment of inertia decreases

c) the angular velocity decreases

d) the angular momentum increases

Question : 13

Which one of the following physical quantities is represented by the shaded area in the given graph?

a) Power

b) Impulse

c) Torque

d) Work done

Question : 14 [CDS]

In cricket match, while catching a fast moving ball, a fielder in the ground gradually pulls his hands backwards with the moving ball to reduce the velocity to zero. The act represents

a) Newton’s third law of motion

b) Newton’s second law of motion

c) Newton’s first law of motion

d) Law of conservation of energy

Question : 15

Watt–hour meter measures

a) power

b) voltage

c) current

d) electric energy