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A 375 g ball is thrown vertically upward with a speed of 3.0 m/s. How high did it go? How fast is it moving when it is 0.25 m high?

How fast is it moving when it is 0.25 m high?

1 answer

The speed of the ball when it is 0.25 m high can be calculated using the equation for kinetic energy: KE = 1/2 mv^2.

KE = 1/2 (375 g)(3.0 m/s)^2 = 5.625 J

KE = 1/2 (375 g)(v^2)

v = sqrt(11.25 J/375 g) = 2.5 m/s

Therefore, the speed of the ball when it is 0.25 m high is 2.5 m/s.