Statics and Dyn...

A particle is moving in a straight line with uniform velocity. Its acceleration is

Resultant velocity of two velocities 30 km/h and 60 km/h making an angle 60° with each other is

A particle has two velocities of equal magnitude inclined to each other at an angle θ . If one of them is halved, the angle between the other and the original resultant velocity is bisected by the new resultant. Then , θ is

A particle having simultaneous velocities 3 m/s, 5 m/s and 7 m/s is at rest. The angle between the first two velocities is

A particle is thrown vertically upwards with velocity 24.5 cm/min. It will return to the original position after

A particle is dropped from a height 12 g m and 4 s after another particle is projected from the ground towards it with a velocity 4g ms^-1 . The time after which the second particle meets first is

A ball falls from rest from top of a tower. If the ball reaches the foot of the tower in 3 s, then height of tower is (take g = 10 m/s²)

A particle is thrown vertically upwards with a velocity of 490 cm/s. It will return to this position after

The amount of force that is needed to accelerate a truck of mass 36000 kg from rest to a velocity of 60 km/h in 20 s is

Two bodies of masses m and 4m are moving with equal momentum. The ratio of their KE is