Motion in A Str...

Just after being hit, a baseball has a horizontal speed of 20 m/s and vertical speed of 25 m/s upward. Ignoring air resistance what are these speeds two seconds later?

A body of mass 2 Kg starts from rest and moves with uniform acceleration. It acquires a velocity 20 m/in 4s. The power exerted on the body in 2s in watts is:

An elevator is going down with a constant acceleration. A coin dropped from a point $$1.8m$$ above the elevator floor takes one second to reach the floor. The magnitude of the acceleration of the the elevator in $$ms^{-2}$$ is $$g=10ms^{-2}$$ 

A ship is moving due east with a velocity of $$12\ m/sec$$. A truck is moving across on the ship with a velocity of 4m/sec.A monkey is climbing a vertical pole mounted on the truck, with a velocity of $$3m/sec$$. Find the velocity of the monkey, as observed by a man on the shore. $$(m/sec)$$

A body is started from rest with acceleration $$ 2 m/s^2 $$ till it attains the maximum velocity then retard to rest with $$ 3 m/s^2 $$. If total time taken is 10 second then maximum speed attained is

A stone is released with acceleration 'a' from an upwardy moving left. Find out the acceleration and direction of the stone.

The two ends of train moving with constant acceleration pass a certain point with velocities u and 2 u. The velocity with which, the middle point of the train passes the same points is.

Acceleration of a body is given by $$ \frac { dv }{ dt } =4-2v $$ .The body started from rest t=0. Then 

Water drops fall at regular intervals from a tap 5 m above ground. The 3 rd drop is leaving tap when first drop reaches ground. The distance of 2 nd drop at the instant is

A machine which is $$75$$% efficient uses $$12$$ joules of energy in lifting up a $$1$$ kg mass through a certain distance. The mass is then allowed to fall through that distance. The velocity at the end of its fall is(in $$ms^{-1}$$):