A ball is throuwn vertially up with a velcity of `20ms^(-1)`. At height , will its K.E. be half its orginal value?

A bal is thrown vertically upwards with a velocity of 4 m/s. At what heiht will its K.E. reduce to half its initial value? (g=10m//^(2) )

A ball is thowon vertically upwards. Draw its velcity-time curve.

Similar balls are thrown vertically each with a velocity 20ms^(-1) , one on the surface of earth and the other on the surface of moon. What will be ratio of the maximum heights attained by them? (Acceleration on moon = 1.7 ms^(-2) approx)

A ball throuwn vertically upwards with a speed of 19.6ms^(-1) from the top of a tower returns to the earth in 6s. Find the height of the tower.

A ball is thrown from a point O with a velocity u=20ms^(-1) at an angle theta=30^(@) with the horizontal.It hits a vertical wall which is at a distance x , from O as shown in the figure.After rebounding from the wall, the ball returns to O without retracing its path. If g=10ms^(-2) and the coefficient restitution e=0.5 ,the value of x is

A ball is projected vertically up wards with a velocity of 100 m/s. Find the speed of the ball at half the maximum height. (g=10 m//s^(2))

The ball is projected vertically down with a velocity of 10sqrt(3)m/s from a height of 20m .On the hitting the ground if it loses 40% of its energy the height to which it bounces is (g=10ms^(-2))

The ball is projected vertically down with a velocity of 10sqrt(3)m/s from a height of 20m .On the hitting the ground if it loses 40% of its energy the height to which it bounces is (g=10ms^(-2))

A helicopter is rising vertically up with a velocity of 5 ms^( –1) . A ball is projected vertically up from the helicopter with a velocity V (relative to the ground). The ball crosses the helicopter 3 second after its projection. Find V.

A body is projected vertically upwards with velocity of 10m/s. At a point P in its path, its P.E. and K.E. are equal. What is the height of the point?