Marie lifts a 5 kg mass from the floor and puts in on a table one metre high. What is the work done?
1 answer:
Answer:
The work done was 49.05 N*m.
Explanation:
The work done by a a force is given by:
We first need to calculate the force necessary to lift the box from the ground, the force needed for is the weigh of the box, which is shown below:
Therefore the work done by lifting the box and placing it on the table is:
The work done was 49.05 N*m.
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Answer:
The swimmer has a distance traveled of 800 meters.
The final displacement of the swimmer is 0 meters.
Explanation:
A lap is a round trip made by a swimmer in the pool, so that the distance traveled by swimmer is sixteen times the length of the swimming pool. That is:
A swimmer has a distance traveled of 800 meters.
The displacement is the distance between swimmer and a reference point, let suppose that reference point is located at the beginning of the first lap. Hence, the final displacement of the swimmer is 0 meters.