How the gravitational potential energy of the ball changed

Reference no: EM1348694

Q. A person doing a chin-up weighs 655 N exclusive of the arms. During the first 15.0 cm of the lift, each arm exerts an upward force of 355 N on the torso. If the upward movement starts from rest, what is the person's velocity at this point?

Q. A 1000 {rm kg} wrecking ball hangs from a 15 {rm m}-long cable. The ball is pulled back until the cable makes an angle of 25.0^circle with the vertical. By how much has the gravitational potential energy of the ball changed?

Reference no: EM1348694

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How the gravitational potential energy of the ball changed : A person doing a chin-up weighs 655 N exclusive of the arms. During first 15 cm of the lift, each arm exerts an upward force of 355N on the torso. If the upward movement starts from rest, what is the person's velocity at this point.

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