Work and simple machines

Quiz
•
Science
•
7th Grade
•
Hard
+2
Standards-aligned
Brittany Schiele
Used 9+ times
FREE Resource
29 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is work?
the transfer of energy that occurs when a force is applied over a distance
the force that draws things to the earth
the force that generates thermal energy
the transfer of energy that occurs due to friction
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is power?
W=Fd
the rate at which work is done
How efficient a machine is
MA=output force/input force
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lifting a stone block 146m to the top of the Great Pyramid required 146,000J of work. How much work was done to lift the block halfway to the top?
36.5 N
73,000J
146,000 W
292,000%
Tags
NGSS.MS-PS3-2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Is working being done when HOLDING a suit case
Yes
No
25J
10W
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A motor applies a 5000-N force and raises an elevator 10 stories. If each story is 4M tall, how much work does the motor do?
75W
3.3333%
200,000J
24 J
Tags
NGSS.MS-PS3-2
NGSS.MS-PS3-4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calculate the power in wats, needed to mow a lawn in 50 minutes. If the work required is 500,000J.
10 W
20 W
30%
30W
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the equation for efficiency?
output work / input work x 100
output force + input force X Work
Input work/ output work
MA = output force/input force
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