(11 %) Problem 7: A tennis ball of mass m 0.073 kg is thrown straight up with an initial speed v0 = 13 m/s. Let the gravita potential energy be zero at the initial height of the tennis ball Randomized Variables m- 0.073 kg vO13 m/s 50% Part (a) what is the maximum height, h in meters, the ball reaches? sinO tanO Jt( cos cotan0 asin coso atanO acotan) sinh(0 1 2 3 cosh0 t cotnhO tanh0 0 Degrees O Radians Submit Hint I give up! Hints: 3% deduction per hint. Hints remaining: 3 Feedback: 0% deduction per feedback 50% Part (b) what is the work done by gravity, w, in Joules, during the ball\'s flight to its maximum height? Solution Here, part A) for the height h m * g * h = 0.50 * m * vo^2 9.8 * h = 0.50 * 13^2 h = 8.62 m maximum height is 8.62 m part b) work done by gravity = - m * g * h work done by gravity = - 0.073 * 9.8 * 8.62 work done by gravity = -6.17 J .

1. (11 %) Problem 7: A tennis ball of mass m 0.073 kg is thrown straight up with an initial speed v0
= 13 m/s. Let the gravita potential energy be zero at the initial height of the tennis ball
Randomized Variables m- 0.073 kg vO13 m/s 50% Part (a) what is the maximum height, h in
meters, the ball reaches? sinO tanO Jt( cos cotan0 asin coso atanO acotan) sinh(0 1 2 3 cosh0 t
cotnhO tanh0 0 Degrees O Radians Submit Hint I give up! Hints: 3% deduction per hint. Hints
remaining: 3 Feedback: 0% deduction per feedback 50% Part (b) what is the work done by
gravity, w, in Joules, during the ball's flight to its maximum height?
Solution
Here,
part A)
for the height h
m * g * h = 0.50 * m * vo^2
9.8 * h = 0.50 * 13^2
h = 8.62 m
maximum height is 8.62 m
part b)
work done by gravity = - m * g * h
work done by gravity = - 0.073 * 9.8 * 8.62
work done by gravity = -6.17 J