# Ch. 5, 6, and 8

## Quiz by Tracy

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21 questions
• Q1
Samantha uses 50 N of force to move a dresser 10 meters. How much work did she do?
5 J
500 J
40 J
60 J
30s
• Q2
Mechanical advantage of a machine is the ratio of
work x power
force/distance
input force/output force
output force/input force
30s
• Q3
Which one is an example of a 2nd class lever?
lifting a barbell
hammer removing a nail
seesaw
wheelbarrow
30s
• Q4
The Law of Inertia is Newton's ___________________.
4th law
2nd law
3rd law
1st law
30s
• Q5
A seesaw is an example of a _______________.
1st class lever
2nd class lever
3rd class lever
4th class lever
30s
• Q6
If an incline plane is 10 meters high with a length of 30 meters, what is the mechanical advantage?
3
40
20
300
30s
• Q7
What uses a combination of two or more simple machines?
compound machine
complex machine
30s
• Q8
What is an example of a wedge?
fulcrum
ramp
screwdriver
axe
30s
• Q9
What is not an example of acceleration?
moving faster
going slower
turning a corner
resting
30s
• Q10
It took Gary 30 seconds and 75 Newtons of force to move a box 5 meters. How much power did he exert?
110 W
2 W
450 W
12.5 W
30s
• Q11
Work has been done when _____________.
force and distance are in opposite directions
force and distance are in the same direction
30s
• Q12
What is the amount of work completed in a certain period of time called?
power
efficiency
motion
30s
• Q13
An object will fall faster when the acceleration is lower due to gravity.
True
False
30s
• Q14
How many hours will it take a car to travel 800 miles if their average speed is 50 mph?
16 hours
6.25 hours
15 hours
12 hours
30s
• Q15
250,000 J of work is needed and it will take 50 seconds to complete the project. How much power is needed? p = w / t
0.0002 J/s
50,000 J/s
500 J/s
5000 J/s
30s

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