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 velocity of the ship relative to the earth V = 9.05
Explanation:
The local ocean current is = 1.52 m/s
Direction = 40°
Velocity component in X - direction = 1.52
°
= 1.164
Velocity component in Y - direction = 8 + 1.52
°
= 8.97
The velocity of the ship relative to the earth
Put the values of and
we get,
⇒
⇒ V = 9.05
This is the velocity of the ship relative to the earth.
Answer: