# Simple Machines I

## Quiz by Rex Williams

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11 questions
• Q1
You have to move a heavy box up on to a high platform. Which simple machines could you use?
Pulley or inclined plane
Pulley or wheel and axle
Inclined plane or lever
Wheel and axle or lever
30s
• Q2
What do simple machines change?
The amount of work and the amount of force.
The amount of force, but not the amount of work.
The amount of distance, and the amount of work.
The amount of work, but not the amount of force.
30s
• Q3
You push a heavy box, but it doesn't move. Are you doing work?
Yes. You got paid.
No. Work requires force and distance.
Yes. Work requires force.
No. You didn't use force.
30s
• Q4
True or false: levers can allow you to lift very heavy objects.
No, levers don't change the amount of force you use.
Yes, levers increase the amount of force you can use.
No, levers can't increase the amount of work you do.
Yes, levers increase the amount of work you can use.
30s
• Q5
If you use many pulleys together, then...
The amount of force needed increases, and the work stays the same.
The amount of work and the amount of force decrease.
The amount of force needed decreases, but the work stays the same.
The amount of work decreases, but the force stays the same.
30s
• Q6
The Law of Conservation of Energy states....
An object in motion tends to stay in motion.
Energy can never be created, but can sometimes be destroyed.
Energy relies on force and distance.
Energy can never be created or destroyed.
30s
• Q7
Which simple machine would you use to reduce the friction of a moving object?
Inclined plane
Wheel and axle
Lever
Pulley
30s
• Q8
Friction reduces the amount of kinetic energy in a moving object. This energy...
Turns into potential energy.
Turns into heat, or thermal energy.
Is destroyed.
Turns into friction energy.
30s
• Q9
You push a box 10 meters with a force of 10 Newtons. What is the amount of work done?
10 N
1 Joule
100 Joules
100
30s
• Q10
You push a box across a floor. You do 30 Joules of work by exerting 6 Newtons of force. How far did it go?
5 meters
180 Joules
5 Joules
180 meters
30s
• Q11
You push a box to the top of a shelf using a 10 meter ramp, doing 50 Joules of work. You then try again with the same box and the same shelf, but using a shorter, steeper 5 meter ramp. How much work do you do?
50 Joules
25 Joules
250 Joules
100 Joules
30s

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