A body is moving with uniform velocity. Its______________________?
(A) speed changes
(B) acceleration changes
(C) direction of motion changes
(D) displacement from origin changes
Why Ballistic missile fails in some circumstances of precision ?
(A) due to their shape
(B) due to air resistance
(C) due to angle of projection
(D) all of these
Time rate of change of momentum is equal to____________________?
(A) force
(B) impulse
(C) velocity
(D) both A and C
At which angle the range of the projectile is maximum____________________?
(A) 45
(B) 60
(C) 30
(D) none
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
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
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
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
Which shows the correct relation between time of flight T and maximum height H ?
(A) H=gT2/8
(B) H=8T2/g
(C) H=8g/T2
(D) H=gT2
What is the shape of velocity, time graph for constant acceleration ?
(A) straight inclined line.
(B) parabola
(C) inclined curve
(D) declined curve