A ball is thrown straight upward with an initial speed of

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A 0.50 kg0.50\,\text{kg} ball is thrown straight upward with an initial speed of 10 m s−110\,\text{m\,s}^{-1}. Air resistance is negligible. If the ball–Earth pair is chosen as the system, what is the total work done on the system by external forces while the ball rises to its highest point? (a) +25 J+25\,\text{J} (b) −25 J-25\,\text{J} (c) 0 J0\,\text{J} (d) +5.0 J+5.0\,\text{J}

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