Bennett Mechanical Test Bennett Mechanical Work and Energy Questions and Answers

Question 1

A 20 N force pushes a box 5 meters in the direction of the force. How much work is done?

Accepted Answer

100 J

Answer

25 J

Answer

4 J

Answer

200 J

Question 2

Which unit is used to measure energy in the SI system?

Accepted Answer

Joule

Answer

Watt

Answer

Newton

Answer

Pascal

Question 3

A spring with a spring constant of 200 N/m is compressed by 0.1 m. What is the elastic potential energy stored?

Accepted Answer

1 J

Answer

2 J

Answer

0.5 J

Answer

20 J

Question 4

A 5 kg object is lifted to a height of 10 m. What is its gravitational potential energy? (g = 10 m/s²)

Accepted Answer

500 J

Answer

50 J

Answer

5000 J

Answer

100 J

Question 5

A machine is 80% efficient and receives 500 J of input energy. How much useful output energy does it deliver?

Accepted Answer

400 J

Answer

420 J

Answer

350 J

Answer

500 J

Question 6

Power is defined as which of the following?

Accepted Answer

Work done per unit time

Answer

Force multiplied by distance

Answer

Mass multiplied by velocity

Answer

Energy multiplied by time

A 20 N force pushes a box 5 meters in the direction of the force.How much work is done?