While saving a goal (Fig. 7.7b), a goalkeeper's hand moved back by 15 cm as she stopped a ball while applying a force of 200 N. How much work did the goalkeeper do on the ball in stopping it?

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TextWork Done by a Constant Force

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A mass of 10 kg is situated at a point A on a long table. The mass is displaced to another point B, where AB = 1.2 m, by applying an external force of 40 N along the path AB. Force of friction acting on the mass is 10 N. Calculate the work done on the mass by (a) the external force applied, (b) force of friction. What is the net work done on the mass?

TextScientific Definition of WorkWork Done by a Constant Force

A cyclist comes to a skidding stop within 10 m. During this process, the force on the cycle due to the road is 250 N and is directly opposed to the motion.

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