Who discovered Hooke's law?

• Robert Hooke

• Charlie

• Newton

___________ is the unit of force

• Km

• cm

• N

________________ force acts on an object when it falls.

• Gravity

• Electromagnet

• Upthrust

Tags

NGSS.MS-PS2-4

A graph of extension against force for an elastic material is:

• A downward curve

• An upward curve

• A straight line from the origin

An elastic material can change shape when ________ is exerted on it.

• a force

• a moment

• an acceleration

Tags

NGSS.MS-PS2-2

When you apply a force to an object, the object can change shape. If tension is applied, the object may be stretched. We say the object has been __________.

• compressed

• extended

• twisted

When you apply a force to an object, the object can change shape. If a compression force is applied, the object may be squashed. We say the object has been __________.

• compressed

• extended

• twisted

The _________ of an object is the increase in its length when it is stretched.

• compression

• extension