**31. When two bodies move toward each other with constant speeds the distance between them decreases at the rate of 6m / sec. If they move in the same direction the distance between them increases at the rate of 4m/sec. Then their speeds are**

A. 5m/s, 1m/s

B. 3m/s, 3m/s

C. 6m/s, 1m/s

D. 4m/s, 2m/s

**32. 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

**33. The distance covered by a body in time t starting from rest is**

A. at2/2

B. Vt

C. a2t/2

D. at2

**34. Flight of a rocket in the space is an example of**

A. The second law of motion

B. Third law of motion

C. First law of motion

D. Law of gravitation

**35. The trajectory (or path) of a projectile is**

A. Straight line

B. Parabola

C. Hyperbola

D. Circle

**36. At which angle the range of the projectile is maximum**

A. 45°

B. 60°

C. 30°

D. None

**37. The force bear by a wall on which water strikes normally at a speed of 10m/sec and at a discharge of 0.0001m3/sec is.**

A. 1 N

B. 10 N

C. 100 N

D. None

**38. The time rate of change of momentum is equal to**

A. Force

B. Impulse

C. Velocity

D. Both A and C

**39. The range of the projectile at 30° and 60° are**

A. Equal to 45°

B. Equal to 90°

C. Equal to each other

D. None of the above

**40. Why Ballistic missile fails in some circumstances of precision?**

A. Due to their shape

B. Due to air resistance

C. Due to the angle of projection

D. All of these

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