Question

When forces are balanced, pulling in opposite directions with equal size, we say they are in ______________________.A force which resists the relative motion of two bodies in direct contact is called _________. When work is done, we know because there is .A is any push or pull in a direction.There is a force which resists changes in motion, called .We know we have exerted a force even when we have done no work. This is called _________.Force * Displacement equals .When a force causes , we know work has been done.

Answer 1

The following words used to complete the blank spaces come from the definitions:

1. When forces are balanced, pulling in opposite directions with equal size, we say they are in equilibrium.

2. A force which resists the relative motion of two bodies in direct contact is called friction.

3. When work is done, we know because there is displacement.

4. A force is any push or pull in a direction.

5. There is a force which resists changes in motion, called inertia.

6. We know we have exerted a force even when we have done no work. This is called effort.

7. Force * Displacement equals work.

8. When a force causes motion, we know work has been done.

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