A ball moves horizontally without friction

PHYSICS · Single correct · CBSE · Physics · Work and Energy · Work and Energy

Problem

A 0.20 kg0.20\,\text{kg} ball moves horizontally without friction. In a qualitative energy-bar chart, the kinetic-energy bars at positions 1 and 2 have heights of 2 units and 8 units, respectively. One unit corresponds to 1.0 J1.0\,\text{J} of energy. What is the ratio of the ball’s speed at position 2 to its speed at position 1? (a) 1.731.73 (b) 44 (c) 22 (d) 0.500.50

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