A bowling ball of mass m=1.57kg is at rest on a spring that is compressed by a distance d=0.401m. The ball is released, and at the moment the spring reaches its equilibrium point, the ball is separates from the spring and undergoes projectile motion at an angle of θ=32.3∘ measured from the horizontal. It is observed that the ball reaches a maximum height of h=4.41m as measured from the initial height of the ball. Let the gravitational potential energy be zero at the initial height of the bowling ball.

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