Forces

Question 1

What is force measured in?

Answer 1

Newtons

Question 2

What is a force?

Answer 2

A push, pull or twist action and they can be non-contact or contact.

Question 3

What are some examples of a non contact force?

Answer 3

Gravity, electrostatic and magnetic.

Question 4

What are some examples of a contact force?

Answer 4

Friction, push, pull or twist.

Question 5

What can a force be?

Answer 5

A push, pull or twist action.

Question 6

What do you use to show how much force is applied to an object in a drawing?

Answer 6

An arrow.

Question 7

What does a force do?

Answer 7

Change the direction of something, change the speed or change the direction.

Question 8

What is the scientific term for a force that moves forward?

Answer 8

Thrust.

Question 9

What is the scientific term for a force in water?

Answer 9

Upthrust.

Question 10

What is the scientific term for when two surfaces rub against each other?

Answer 10

Friction.

Question 11

What is the scientific term for a pulling force?

Answer 11

Tension.

Question 12

What is the scientific term for when one object squashes another?

Answer 12

Compression.

Question 13

What is the scientific term for when an object passes through the air?

Answer 13

Air resistance.

Question 14

What holds water on a coin?

Answer 14

Surface tension

Question 15

Why don’t you fall through the floor?

Answer 15

The forces are equal between pushing up and down.

Question 16

Why does a helicopter spin?

Answer 16

Because of the air resistance.

Question 17

What is mass and how is it measured?

Answer 17

Mass is how much matter something has and it is measured in kilograms.

Question 18

When is weight and how is it measured?

Answer 18

Weight is how much of a gravitational force something has on an object and it is measured in newtons.

Question 19

What is air resistance?

Answer 19

Air resistance is the air molecules taking energy from the object to move out of its path.

Question 20

What is friction?

Answer 20

It is the force between two objects when they touch.

Question 21

When is friction a good thing?

Answer 21

When things need to stop, slow down or start moving.

Question 22

When is friction a bad thing?

Answer 22

When there is too much friction, it can cause things to slow down to much but when there isn’t enough, things just slide everywhere.

Question 23

How can friction be reduced?

Answer 23

By making the surface smoother.

Question 24

What causes a boat to float?

Answer 24

Buoyancy.

Question 25

What is density and how do you calculate it?

Answer 25

Density is a measure of how tightly a matter into any matter and you calculate it by dividing mass by volume.

Question 26

What is buoyancy?

Answer 26

Buoyancy is the force that pushes upwards to keep things on water afloat.

Question 27

What type of machine is a seesaw?

Answer 27

A first class lever.

Question 28

What are the three different types of levers and what are some examples?

Answer 28

First class is a seesaw, second class is a wheelbarrow and third class is a pair of tongs.

Question 29

What is a permanent magnet?

Answer 29

A magnet that never loses its magnetism?

Question 30

What is a temporary magnet?

Answer 30

A meaner that loses their magnetism after a while.

Question 31

What are magnetic poles?

Answer 31

Magnetic poles are the north and south sides of a magnet.

Question 31

What are magnetic fields?

Answer 31

Magnetic fields is the magnetic force around a magnet.

Question 32

What is a fair test?

Answer 32

Where in an investigation, only one variable is changed at a time.

Question 33

What is an independent variable?

Answer 33

It is the variable that you change throughout the experiment.

Question 34

What is it controlled variable?

Answer 34

Is the variable that stays the same throughout the entire experiment.

Question 35

What is a dependent variable?

Answer 35

The dependent variable is the one that you measure.