Question

In: Physics

A ball is released from the top of the building and reaches the ground after 5...

A ball is released from the top of the building and reaches the ground after 5 seconds (15 points). a) What is the velocity of the ball when it hits the ground? b) What is the height of the building? c) How much the ball falls in the last 2 seconds of the motion?

Expert Solution

Time taken for the ball to reach the ground is

a) As the released from the top of building, its initial velocity(vertical) is

Using kinematics equation,

Negative sign indicates the direction of velocity.

Magnitude of velocity of ball when it reaches the ground is

b)

Using kinematics equation

As the ball descends down the height, .

Height of the building is

c)

Distance traveled by ball in first 3 seconds of time is

Distance traveled by ball in last 2 seconds of its motion is

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genius_generous answered 2 years ago

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