- 1. Which of the following is defined as a push or a pull?
A) power
B) work
C) watt
D) force
- 2. What is the SI unit for force?
A) watts
B) newtons
C) meters
D) joules
- 3. Which of the following has been accomplished when an object is moved through a distance in the direction of the applied force?
A) motionless
B) work
C) balanced force
D) force
- 4. Which of the following is a device that makes work easier?
A) power
B) force
C) machine
D) work
- 5. Which of the following is NOT a way in which simple machines make work easier:
A) to change the effort needed
B) to change the direction or distance through which the force is applied
C) to change the reference point of the object
D) to change the speed at which the resistance moves
- 6. Why is the work put into a machine always great than the work output?
A) power
B) mechanical advantage
C) friction
D) ideal
- 7. The ratio of work output to work input is called -
A) power
B) force
C) mass
D) efficiency
- 8. Given the formula: work = force x distance, if a box is moved 10 m with a force of 5 newtons, how much work is accomplished?
A) 0.5 Joules
B) 50 Joules
C) 500 Joules
D) 100 Joules
- 9. Given the formula: power = work/time, how much power is used when 6 Joules of work is accomplished in 2 seconds?
A) 3 watts
B) 12 watts
C) 2 watts
D) 6 watts
- 10. Is work being accomplished when you carry a stack of books from room to room?
A) Yes
B) No
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