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What is the unit for power?
the direction of the force
400 J
The object must move in the same direction as the force.
watt
a school crossing guard raises a stop sign that weighs 10N.
the size and direction of the input force
power
compound machine
In which situation is a person doing work on an object?
the direction of the force
400 J
The object must move in the same direction as the force.
watt
a school crossing guard raises a stop sign that weighs 10N.
the size and direction of the input force
power
compound machine
What does a fixed pulley change
the direction of the force
400 J
The object must move in the same direction as the force.
watt
a school crossing guard raises a stop sign that weighs 10N.
the size and direction of the input force
power
compound machine
Which of the following must happen for work to be done?
the direction of the force
400 J
The object must move in the same direction as the force.
watt
a school crossing guard raises a stop sign that weighs 10N.
the size and direction of the input force
power
compound machine
If two people lift identical stacks of books the same direction and one person does the job twice as fast which of the following is true?
the direction of the force
400 J
The object must move in the same direction as the force.
watt
a school crossing guard raises a stop sign that weighs 10N.
the size and direction of the input force
power
compound machine
What is a machine that is made of two simple machines?
the direction of the force
400 J
The object must move in the same direction as the force.
watt
a school crossing guard raises a stop sign that weighs 10N.
the size and direction of the input force
power
compound machine
When a screwdriver is used as a lever to open a paint can, what is changed as the work is done?
the direction of the force
400 J
The object must move in the same direction as the force.
watt
a school crossing guard raises a stop sign that weighs 10N.
the size and direction of the input force
power
compound machine
Greg applies a force of 200 N to move a box 2 meters. How much work did he do?
the direction of the force
400 J
The object must move in the same direction as the force.
watt
a school crossing guard raises a stop sign that weighs 10N.
the size and direction of the input force
power
compound machine
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