1. Work = force x distance
Work = 5000 N x 30 m
Work = 150,000 Nm
Work = 150,000 J
Therefore, 150,000 Joules of work is done on the ship if it moves a distance of 30 m.
2. Power = work / time
Power = 150,000 J / 160 s
Power = 937.5 W
Therefore, the power exerted by the tugboat is 937.5 Watts if the ship moved 30 m in 160 s.
Directions: ● Refer to this Grade 8 Physics Reference Sheet and your knowledge of science to solve Problems 1–7. Show your work and use correct units of measurement. Problems: Use the information below and your knowledge of science to answer Questions 1 and 2 that follow. A tugboat pulls a ship with a constant net horizontal force of 5,000 N and causes the ship to move through a harbor.
F >>> 5000 N
1. How much work is done on the ship if it moves a distance of 30 m? 2. Calculate the power exerted by the tugboat if the ship moved 30 m in 160 s?
1 answer
1 answer