A box with a mass of 8 kg is lifted without acceleration, Ask an Expert

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Q1. A box with a mass of 8 kg is lifted (without acceleration) through a height of 9 m, in order to place it upon the shelf of the closet.

A. What is the increase in potential energy of the box?

B. How much work was required to lift the box to this position?

Q2. A 52.00 kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.26 x 10^2 m/s from the top of a cliff 126 m above level ground, where the ground is taken to be y = 0.

What is the initial total mechanical energy of projectile?

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Category:- Physics
Reference No.:- M9165072

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