Science Quiz

What is a system?

Define an input.

Define an output.

What is the purpose of a system?

A Force is...

A push or pull.

The ability to apply a force to move an object a certain distance.

What is energy?

What is work?

What is the formula for mechanical efficiency?

What is Mechanical efficiency?

What are simple machines?

What are all the simple machines?

What is the formula for work?

You push a 40N table and it moves 0m. How much work did it take to move the table 0m?

You pick up from the ground a 20 N rock above your head to a total height of 1.5 m. How much work did it take to raise the rock?

How are systems organized?

What is a component?

What are subsystems?

A pully takes a force of 90N to raise a 70 N container of nails. The nails are raised 8 m to the second floor. What is the efficiency of the pully?

A crane takes 4 N to raise a 6 N cement block. The cement block is raised 10 m to the second floor. What is the efficiency of the crane?

If an object does not move any distance what can we conclude about the work put into the object?

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