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1. A 5kg block is push up a rough, inclined surface by a constant force of 20N. The surface is inclined at an angle of 15° and the force is applied completely horizontally and parallel to the ground below the incline. (Not parallel to the inclined surface). As a result, the velocity of the block increases from 0 m/s to 4 m/s in a displacement of 10m. A)What work was done by the frictional force during this displacement? B)What would have been the final velocity if friction was not present? C) Why was the final kinetic energy without friction higher than the total kinetic energy with friction?

1. A 5kg block is push up a rough, inclined surface by a constant force of 20N. The surface is inclined at an angle of 15° and the force is applied completely horizontally and parallel to the ground below the incline. (Not parallel to the inclined surface). As a result, the velocity of the block increases from 0 m/s to 4 m/s in a displacement of 10m. A)What work was done by the frictional force during this displacement? B)What would have been the final velocity if friction was not present? C) Why was the final kinetic energy without friction higher than the total kinetic energy with friction?

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1. A 5kg block is push up a rough, inclined surface by a constant force of 20N. The surface is inclined at an angle of 15° and the force is applied completely horizontally and parallel to the ground below the incline. (Not parallel to the inclined surface). As a result, the velocity of the block increases from 0 m/s to 4 m/s in a displacement of 10m. A)What work was done by the frictional force during this displacement? B)What would have been the final velocity if friction was not present? C) Why was the final kinetic energy without friction higher than the total kinetic energy with friction?
Transcribed Image Text:1. A 5kg block is push up a rough, inclined surface by a constant force of 20N. The surface is inclined at an angle of 15° and the force is applied completely horizontally and parallel to the ground below the incline. (Not parallel to the inclined surface). As a result, the velocity of the block increases from 0 m/s to 4 m/s in a displacement of 10m. A)What work was done by the frictional force during this displacement? B)What would have been the final velocity if friction was not present? C) Why was the final kinetic energy without friction higher than the total kinetic energy with friction?
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