Unit 3 - Forces 1 (Measuring, Stretch, Hooke's Law)

Question 1

An effort that causes an object to change movement, direction, or shape because of being pushed

Answer 1

Pushing force

Question 2

An effort that causes an object to change movement, direction, or shape because of being pulled

Answer 2

Pulling force

Question 3

A force that causes a turning effect about a pivot

Answer 3

Turning force

Question 4

The unit of force

Answer 4

Newton (N)

Question 5

A device that uses the stretching of a spring to measure force

Answer 5

Newtonmeter

Question 6

How close measured values are for repeated results

Answer 6

Precision

Question 7

The force of gravity acting on an object

Answer 7

Weight

Question 8

The force that pulls masses towards one another

Answer 8

Gravity

Question 9

The amount of matter in an object measured in kilograms (kg)

Answer 9

Mass

Question 10

When there is no mass nearby to exert a force due to gravity or the apparent feeling of a lack of gravitational force acting due to an object falling in a gravitational field e.g. Feeling weightless when in orbit around a planet.

Answer 10

Weightless

Question 11

Suggestions with reasons of what may occur (if…then…)

Answer 11

Prediction

Question 12

The force an object exerts on something else

Answer 12

Action force

Question 13

An equal sized force acting in the opposite direction to the action force

Answer 13

Reaction force

Question 14

To squash with a force

Answer 14

Compress

Question 15

To use a pulling force to make something longer

Answer 15

Stretch

Question 16

When a material returns to its original shape and size after a deforming force is removed

Answer 16

Elastic behaviour

Question 17

The maximum force that can be applied to a material for it to return back to its original size and shape without being permanently changed

Answer 17

Elastic limit

Question 18

Easily cracked or broken by hitting or bending

Answer 18

Brittle

Question 19

The increase in length of a material when a stretching force is applied

Answer 19

Extension

Question 20

This Law states a spring will extend regularly as the force on it is increased (the extension is proportional to the load up to the elastic limit) – force = spring constant × extension (F = k × e)

Answer 20

Hooke’s Law