Turning Forces (Year 8 Physics)

The following test is covering 'Turning Forces' for Year 8 Physics.

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Question 1

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When does a lever work most effectively?

What is the equation for calculating the moment of a force?

What is the principle of moments?

What is one of the main factors determining the magnitude of a turning force?

Where should you try to push to turn a rotating door with the least effort?

What happens when you increase the load arm length of a lever?

If an object is not turning, what can be said about the turning forces?