Motion in A Str...

A body thrown vertically up from the ground passes the height $$10.2m$$ twice at an interval of $$10 sec$$. Its initial velocity was (in m/s) :

A person throws balls into air vertically upward in regular intervals of time of one second. The next ball is thrown when the velocity of the ball thrown earlier becomes zero. The height to which the balls rise is _____
(Assume, $$g = 10 m{s}^{-2}$$)

Find the magnitude of constant acceleration (in $$m/s^2$$) needed to allow a car to accelerate in a straight line from a speed of zero to a speed of $$30 m/s$$ in $$5 s$$ :

A motor scooter travels east at a speed of $$13 m/s$$. The driver then reverses direction and heads west at $$17 m/s$$.  What was the change in velocity of the scooter? (in m/s)

An airplane must reach a take of speed of $$80 m/s$$ in a $$1000 m$$ long runway. What minimum constant acceleration is required? (in $$m/s^2$$)

A race car accelerates uniformly from $$18.5 m/s$$ to $$46.1 m/s$$ in $$2.47$$ seconds. Determine the acceleration of the car. (in $$m/s^2$$)

How far below to top of the well is the surface of the water? 

Luke Autbeloe drops a pile of roof shingles from the top of a roof located $$8.52$$ meters above the ground. Determine the time required for the shingles to reach the ground.

A marble starts falling from rest on a smooth inclined plane forming an angle $$\alpha$$ with horizontal. After covering distance $$h$$ the ball rebound off the plane. The distance from the impact point where the ball rebounds for second time is

A flowerpot falls from a windowsill $$25.0 m$$ above the sidewalk. How fast is the flowerpot moving when it strikes the ground? (in m/s)