A ball is thrown vertically upwards. It goes to a height 20 m and then returns to the ground. Taking acceleration due to gravity g to be 10 m s -2 find (a) the initial velocity of the ball (b) the final velocity of the ball on reaching the ground and (c) the total time of journey of the ball.

As we know, from the equation of motion, v 2 = u 2 - 2gs (a = - g as movement is against gravity ) Given, s = 20 m g = 10 m s -2 v = 0 Substituting the values in the formula, we get, Hence, initial velocity of the ball = 20 m s -1 (b) As we know, from the equation of motion, v 2 = u 2 + 2gs When the ball starts falling after reaching the maximum height, it's velocity (u) = 0 s = 20 m g = 10 m s -2 Substituting the values in the formula, we get, Hence, final velocity of the ball on reaching the ground = 20 m s -1 (c) As we know, total time of of journey of ball (t) = and u = 20 m s -1 g = 10 m s -2 Substituting the values in the formula, we get, Hence, total time for which the ball stays in air = 4 s

A ball is released from a height and it reaches the ground in 3 s. If g = 9.8 m s^-2, find —
(a) the height from which the ball was released,
(b) the velocity with which the ball will strike the ground.

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What force, in newton, your muscles need to apply to hold a mass of 5 kg in your hand ? State the assumption.

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A body is dropped from the top of a tower. It acquires a velocity 20 m s^-1 on reaching the ground. Calculate the height of the tower. (Take g = 10 m s^-2)

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A ball is thrown vertically upwards. It returns 6 s later. Calculate (i) the greatest height reached by the ball, and (ii) the initial velocity of the ball. (Take g = 10 m s^-2 )

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Physics

A ball is thrown vertically upwards. It goes to a height 20 m and then returns to the ground. Taking acceleration due to gravity g to be 10 m s^-2
find —
(a) the initial velocity of the ball
(b) the final velocity of the ball on reaching the ground and
(c) the total time of journey of the ball.

Laws of Motion

Related Questions

A ball is released from a height and it reaches the ground in 3 s. If g = 9.8 m s^-2, find —
(a) the height from which the ball was released,
(b) the velocity with which the ball will strike the ground.

What force, in newton, your muscles need to apply to hold a mass of 5 kg in your hand ? State the assumption.

A body is dropped from the top of a tower. It acquires a velocity 20 m s^-1 on reaching the ground. Calculate the height of the tower. (Take g = 10 m s^-2)

A ball is thrown vertically upwards. It returns 6 s later. Calculate (i) the greatest height reached by the ball, and (ii) the initial velocity of the ball. (Take g = 10 m s^-2 )

Physics

A ball is thrown vertically upwards. It goes to a height 20 m and then returns to the ground. Taking acceleration due to gravity g to be 10 m s-2find —(a) the initial velocity of the ball(b) the final velocity of the ball on reaching the ground and(c) the total time of journey of the ball.

Laws of Motion

Related Questions

A ball is released from a height and it reaches the ground in 3 s. If g = 9.8 m s-2, find —(a) the height from which the ball was released,(b) the velocity with which the ball will strike the ground.

What force, in newton, your muscles need to apply to hold a mass of 5 kg in your hand ? State the assumption.

A body is dropped from the top of a tower. It acquires a velocity 20 m s-1 on reaching the ground. Calculate the height of the tower. (Take g = 10 m s-2)

A ball is thrown vertically upwards. It returns 6 s later. Calculate (i) the greatest height reached by the ball, and (ii) the initial velocity of the ball. (Take g = 10 m s-2 )

A ball is thrown vertically upwards. It goes to a height 20 m and then returns to the ground. Taking acceleration due to gravity g to be 10 m s^-2
find —
(a) the initial velocity of the ball
(b) the final velocity of the ball on reaching the ground and
(c) the total time of journey of the ball.

A ball is released from a height and it reaches the ground in 3 s. If g = 9.8 m s^-2, find —
(a) the height from which the ball was released,
(b) the velocity with which the ball will strike the ground.

A body is dropped from the top of a tower. It acquires a velocity 20 m s^-1 on reaching the ground. Calculate the height of the tower. (Take g = 10 m s^-2)

A ball is thrown vertically upwards. It returns 6 s later. Calculate (i) the greatest height reached by the ball, and (ii) the initial velocity of the ball. (Take g = 10 m s^-2 )