Physics1

Identify the pair whose dimensions are equal.

• Stress and energy

• force and work

• Impulse and momentum

• force and energy

The velocity-time graph of a body moving in a straight line is shown in the figure. The displacement and distance travelled by the body in 6 sec are respectively

• 8 m, 16 m

• 16 m, 8 m

• 16 m, 16 m

• 8 m, 8 m

The velocity of a body depends on time according to the equation v = 20 + 0.1t2. The body is undergoing

• Uniform acceleration

• Uniform retardation

• Non-uniform acceleration

• Zero acceleration

If a particle moves in a circle describing equal angles in equal times, its velocity vector

• Remains constant

• Changes in magnitude

• Changes in direction

• Changes both in magnitude and direction

Equal forces F act on isolated bodies A and B. The mass of B is three times that of A. The magnitude of the acceleration of A is:

• three times that of B

• 1/3 that of B

• the same as B

• nine times that of B

A ball with a weight of 1.5 N is thrown at an angle of 30 above the horizontal with an initial speed of 12 m/s. At its highest point, the net force on the ball is:

• 9.8 N, 30 below horizontal

• zero

• 9.8 N, up

• 1.5 N, down

A person is holding a bucket by applying a force of 10 Newton. He moves a horizontal distance of 5 m and then climbs up a vertical distance of 10 m. Find the total work done by him.

• 100 J

• 150 J

• 50 J

• 500 J

The length of a second's pendulum on the surface of earth is 1 m. Its length on the surface of the moon is

• 1/6 m

• 1 m

• 1/36m

• 36 m

A couple is acting on a two-particle system. The resultant motion will be

• Purely rotational motion

• purely linear motion

• both A and B

• neither A and B

Moment of inertia of a body is 1Kg m2.If the body makes 2 revolutions per second, its angular momentum is

• 2π Js

• 4π Js

• π Js

• π/2 Js