Chap

Question 1

Different types of waves

Answer 1

Pulling force Frictional force
Pushing force Weight force
Air resistance force Electrical force
Applied force Magnetic force
Gravitational force Normal force (reaction force)
Tension force

Question 2

How do particles gain energy to move around?

Answer 2

From heat(kinetic energy)

Question 3

How does diffusion happen?

Answer 3

When particles move from an area of high concentration to low concentration, they diffuse.

Question 4

G force

Answer 4

Gravitational force

Question 5

Transverse waves

Answer 5

Waves that travel in a swaying line

Question 6

How does light move?

Answer 6

In longitudinal waves

Question 7

What is the protective layer on the front of you eye?

Answer 7

The cornea

Question 8

What goes right at the back of your eye?

Answer 8

The retina

Question 9

What sends the images from the eye to the brain

Answer 9

The optical nerve

Question 10

Contact force

Answer 10

A contact force is any force that requires contact to occur.Pushing a car up a hill or kicking a ball or pushing a desk across a room are some of the everyday examples where contact forces are at work.

Question 11

Non-contact force

Answer 11

A non-contact force is a force which acts on an object without coming physically in contact with it. The most familiar example of a non-contact force is gravity, which confers weight. In contrast a contact force is a force applied to a body by another body that is in contact with it.

Question 12

Force diagram

Answer 12

In physics and engineering, a free body diagram is a graphical illustration used to visualize the applied forces, movements, and resulting reactions on a body in a given condition. They depict a body or connected bodies with all the applied forces and moments, and reactions, which act on the body.

Question 13

Interaction pairs

Answer 13

These two forces are called action and reaction forces and are the subject of Newton’s third law of motion. Formally stated, Newton’s third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects.

Question 14

Newtons

Answer 14

Newtons are a unit to help measure strength or tension.

Question 15

Newton metre

Answer 15

A Newton metre is a utensil used to measure Newtons.

Question 16

Deform

Answer 16

To make something miss happen or to make something go out of shape.

Question 17

Compress

Answer 17

If you compress something you increase its density.

Question 18

Reaction force

Answer 18

The opposing force lets say in gravity that keeps you from plummeting through the ground.

Question 19

Extension

Answer 19

If you extend something you make it longer.

Question 20

Elastic limit

Answer 20

If you stretch a rubber it’s elastic limit is when it stops stretching.

Question 21

Hooke’s Law

Answer 21

Hooke’s law: force = spring constant × extension. This is when: force (F) is measured in newtons (N).

Question 22

Balanced force

Answer 22

Balance forces are two forces acting in opposite directions on an object, and equal in size.

Question 23

Unbalanced force

Answer 23

Balanced forces do not cause a change in motion. When balanced forces act on an object at rest, the object will not move. If you push against a wall, the wall pushes back with an equal but opposite force. Neither you nor the wall will move. Forces that cause a change in the motion of an object are unbalanced forces.

Question 24

Weight

Answer 24

The weight of an object is it and the weight of it pushing into the ground.

Question 25

Friction

Answer 25

When a material rubs against another it creates a friction.

Question 26

Drag

Answer 26

Air resistance, or drag, is when a moving object slows down because of the density of the other medium.

Question 27

Gravity

Answer 27

the force that attracts a body towards the centre of the earth, or towards any other physical body having mass.

Question 28

Water resistance

Answer 28

The same concept as air resistance, except for with water.

Question 29

Streamlined

Answer 29

If something is streamlined, it can avoid air resistance or water resistance by cutting through it.

Question 30

3 effects of forces

Answer 30

The effects of forces are: change shape, to start moving, to stop moving, to accelerate or decelerate.

Question 31

Tension

Answer 31

If something is tense, it has a force acting on it, making is straight and tight.

Question 32

Normal force

Answer 32

It is another name for reaction force.

Question 33

Thrust

Answer 33

Is an engine force pushing forwards or backwards.

Question 34

Upthrust

Answer 34

You can get upthrust from normal force and water being blow you.