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An astronaut’s boots of weight 120 N on Earth is measured again when they are brought to the Moon’s surface. What is the weight of the boots on the Moon? Take the g of the Earth as 10 N/kg and the g of the Moon as 1.6 N/kg.

• 11.8 N

• 15.3 N

• 19.2 N

• 21.7 N

You lift a suit case from the floor and keep it on a table. The work done by you on the suit case does not depend on

• path taken by suit case

• time taken in doing the work

• weight of suit case

• both (A) and (B)

A motor cycle and a car are moving on a horizontal road with same velocity. If they are brought to rest by

the application of brakes, which provided equal retardation, then

• (A) motor cycle will stop at shorter disence.

• (B) car will stop at a shorter distance.

• (C) both will stop at same distance.

• (D) nothing can predkted.

Acceleration due to gravity on moon is 1.6 m/sec^2. An inflated balloon is released on moon. It will

• move down with acceleration 1.6 m/s^2

• move up with acceleration 1.6 m/s^2

• move up with acceleration 9.8 m/s^2

• move down with acceleration 9.8 m/s^2

A student of mass 60 kg takes 10 s to climb a flight of

stairs that has 20 steps. The height of each step is 15

cm, calculate the power of the student.

• (A) 110 W

• (B) 130 w

• (c) 150 w

• (D) 180 w

The gravitational attraction between the two bodies

increases when their masses are ....

(A) reduced and distance is reduced.

(B) increased and distance is reduced.

(C) reduced and distance is increased.

(D)increased and distance is increased.

• (A)

• (B)

• (c)

• (D)

A cricket ball of mass 250 g collides with a bat with a

velocity 10 m/s and retums with same velocity within

0.01 sec. The force acting on bat is

(A) 25 N (B) 50 N

(C) 250 N (D) 500 N

• A

• B

• C

• D

A particle starts from rest and travels a distance s with

uniform acceleration, then it travels a distance 2s with

uniform speed, finally it travels a distance 3s with

uniform retardation and comes to rest. If the complete

motion of the particle is a straight line then the ratio

of its average velocity to maximum is

(A) 6/7 (B) 4/5

(C) 3/5 (D) 2/5

• A

• B

• C

• D

Which of the following examples is not related to the

concept of inertia ?

(A) A book remains stationary on a table.

(B) A car passenger jerks forward when the car brakes suddenly.

(C) Coffee spills from a cup when the cup is pushed.

(D)The fragrance of a diffuses into a living room.

• A

• B

• C

• D

When a is projected vertically up, its P.E. is twice

its K.E. when it is at a height h above the ground. At

what height will its K.E. be twice the P.E. ?

A) 2 h B) h/2

(C) h/6 (D) h/4

• A

• B

• C

• D