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Starting from rest, a 2.97 kg block slides 2.44 m down a rough 39.4 ◦ incline....

Starting from rest, a 2.97 kg block slides 2.44 m down a rough 39.4 ◦ incline. The coefficient of kinetic friction between the block and the incline is 0.471. The acceleration of gravity is 9.8 m/s 2 .

1)Find the work done by the force of gravity. Answer in units of J.

2)Find the work done by the friction force between block and incline. Answer in units of J.

3)Find the work done by the normal force. Answer in units of J.

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