Physical Science: Motion, Forces, and Energy, Book M

Section 1: Work and Power

Self-Check Quiz-Eng.

1.
What is transferred when work is done?
A)mass
B)matter
C)velocity
D)energy
2.
Which is an example of work being done in a scientific sense?
A)pushing against a stationary box
B)lifting a box
C)doing homework
D)carrying a box
3.
What is a sign that work is being done?
A)motion
B)mass
C)matter
D)density
4.
When you climb stairs and then walk down a hallway, in which direction is the work done?
A)downward
B)along the hallway
C)upward
D)in the opposite direction that you walk
5.
What is the scientific formula for work?
A)W = F/d
B)W = F + d
C)W = F x d
D)W = F - d
6.
The unit for work is a joule, which is equal to __________.
A)N/m
B)N + m
C)N x m
D)N - m
7.
Power is measured by which units?
A)newtons
B)joules
C)watts
D)newton-meters
8.
What happens to the amount of power expended when you are climbing stairs and then climb faster?
A)It increases.
B)It decreases.
C)It stays the same.
D)It stops.
9.
When the pyramids were built, blocks were lifted from a quarry and moved across the desert. When was work done in a scientific sense?
A)moving the blocks across the desert
B)lifting the blocks
C)when lifting the blocks and when moving them across the desert
D)No work was done in a scientific sense.
10.
A 5,000 N block was lifted 10 m. How much work was done?
A)500 J
B)50 J
C)50 000 J
D)5 000 J
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