Hooke's law

Hooke's law: what is k represent?

• force

• spring constant

• extension

• elastic limit

Hooke's law: F=kx, what is F represent?

• force

• spring constant

• extension

• elastic limit

Hooke's law: F=kx, what is x represent?

• force

• spring constant

• extension

• elastic limit

please draw the elastic limit

stretched length - original length = ?

(a)  

sun is an example of ?

• star

• planet

• comet

• meteor

Four objects are each acted on by only two forces, as shown. Which object is in equilibrium?

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拼写单词：加速度（名词）

(a)  

The diagram shows a handle with three forces, each 100 N, applied to it. The handle is free to move.

• The handle will move downwards.

• The handle will not move.

• The handle will turn anticlockwise (to the left).

• The handle will turn clockwise (to the right).

1. Objects with different masses are hung on a spring. The diagram shows how much the spring stretches.

• 110g

• 150g

• 200g

• 300g