Taking off rocket can be explained by __________________?

A. 1st law of motion
B. 2nd law of motion
C. Law of conservation of momentum
D. Law of conservation of energy

What is the angle of projection for which the range and maximum height become equal ?

A. Tan-1 ¼
B. Tan-1 4
C. Tan-1 ½
D. Tan-1 2

Distance covered by a freely falling body in 2 seconds will be__________________?

A. 4.9 m
B. 19.6 m
C. 39.2 m
D. 44.1 m

Flight of a rocket in the space is an example of______________________?

A. Second law of motion
B. Third law of motion
C. First law of motion
D. Law of gravitation

At which angle the range of the projectile is maximum____________________?

A. 45
B. 60
C. 30
D. None

3rd law of motion explains______________________?

A. Effect of force
B. Existence of a force
C. Existence of two forces
D. Existence of pair of forces in nature

The dimension of force is____________________?

A. Mlt-2
B. Ml2t-2
C. Ml2t2
D. Ml-2t-2

Which of the following pair has same direction always ?

A. Force, displacement
B. Force, velocity
C. Force, acceleration
D. Force, momentum

The collision between two bodies be elastic if bodies are_________________?

A. Solid and soft
B. Soft and elastic
C. Solid and hard
D. Hard and elastic

When body is in motion, ____________ always changes?

A. Its velocity
B. Its acceleration
C. Its position vector
D. Its momentum