Abaseball of mass 0.143 kg is thrown from the roof of a building 23.1 m above the ground. its initial velocity is 37.6 m/s at an angle of 45◦ above the horizontal. the acceleration of gravity is 9.81 m/s 2 . what is the maximum height above the ground that the ball reaches?

A 0.17 kg baseball is launched from the roof of a building 14 m above the ground. Its initial velocity is 29 m/s at 40° above the horizontal. Assume any effects of air resistance are negligible.

(a) What is the maximum height above the ground that the ball reaches?

m

(b) What is the speed of the ball as it strikes the ground?

m/s

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