Physical Science

Chapter 5: Work and Machines

Section 1 Self-Check Quiz-Eng.

1.
__________ is the transfer of energy that occurs when a force makes an object move.
A)Effort
B)Resistance
C)Power
D)Work
2.
In which of the following situations do your arms do work on books?
A)holding a heavy stack of books while standing
B)carrying a heavy stack of books
C)dropping a stack of books onto a table
D)picking up a pile of books from the floor
3.
When work is done, there is always a(n) __________.
A)constant rate
B)single movement involved
C)transfer of energy
D)increase in the mechanical advantage
4.
Which of the following equations should be used to calculate work done?
A)W = F X d
B)W = F/d
C)W = F X a
D)W = m X d
5.
You apply a force of 18 N to a dresser and move it 3 m. How much work did you do on the dresser?
A)54 J
B)6 J
C)21 J
D)27 J
6.
__________ is the rate at which work is done.
A)Force
B)Effort
C)Power
D)Efficiency
7.
Which of the following equations should be used to calculate power?
A)P = W X t
B)P = W/t
C)P = F/t
D)P = m X a
8.
Power is measured in __________.
A)joules
B)newtons
C)watts
D)m/s
9.
A watt is equal to __________.
A)one newton-meter
B)one meter per second
C)one newton per second
D)one joule per second
10.
Which of the following equations should be used to calculate power if work is not done?
A)P = E X t
B)P = E/t
C)P = F/t
D)Power cannot be measured if work is not done.
11.
If you apply a force of 10 N to a box and push it 10 m in 10 s, how much power did you deliver?
A)30 W
B)1 000 W
C)10 W
D)100 W
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