Forces And Their Effects (paper1)

Question 1

What are used instead of machines in many parts of the world

Answer 1

Animals

Question 2

When is energy transferred

Answer 2

Whenever things happen

Question 3

When can energy also be transferred

Answer 3

When a force makes something move

Question 4

What is the energy transferred by a force called

Answer 4

Work done

Question 5

What does work done depend on

Answer 5

The size of the force and how far the forced moved

Question 6

What is the work done equation

Answer 6

Work done = force x distance moved in the direction of the force

Question 7

What is power

Answer 7

The rate at which energy is transferred

Question 8

What is power measured in

Answer 8

Watts

Question 9

What does 1 watt equate to

Answer 9

1 joule of work done

Question 10

What is the power equation

Answer 10

Power = work done divided by time taken

Question 11

How can objects interact

Answer 11

By exerting forces on one another

Question 12

What are the forces if the objects are touching

Answer 12

Contact forces

Question 13

Give an example of a normal contact force

Answer 13

The floor upwards forcing against your weight

Question 14

What is upthrust balanced by

Answer 14

Gravity

Question 15

What type of force is gravity

Answer 15

Non-contact force

Question 16

When does gravity occur

Answer 16

Between any two objects that have a mass

Question 17

How does the moon stay in orbit around the earth

Answer 17

Because the two bodies are attracting each other

Question 18

The force from the moon on the earth is the same as what

Answer 18

The force from the earth on the moon

Question 19

What direction are the forces between the earth and moon going in

Answer 19

Opposite directions

Question 20

How can the gravitational forces between two objects with a mass be shown

Answer 20

Using vectors

Question 21

What are vectors

Answer 21

Arrows that show both direction and magnitude

Question 22

What’s an action-reaction force

Answer 22

Pairs of forces acting on different objects in opposite directions

Question 23

What is a force field

Answer 23

The space around an object where it can affect other objects

Question 24

Name some fields

Answer 24

Gravitational, magnetic, electric

Question 25

What does an object charged with static electricity have

Answer 25

An electric field

Question 26

What can a magnet attract

Answer 26

Objects that have magnetic materials

Question 27

What is it called the forces are equal in size but in opposite directions

Answer 27

Resultant forces or net force

Question 28

Are forces acting on an object always acting along the same line

Answer 28

No

Question 29

How could we figure out how much thrust is pushing a plane forwards and upwards

Answer 29

By resolving the thrust force into two component forces that are right angles to each other

Question 30

What is a turning force called

Answer 30

A moment

Question 31

What does the moment of a force depend on

Answer 31

The size of the force and where the force is applied

Question 32

How can we greater a greater moment

Answer 32

The further away from the pivot and and the greater the force applied

Question 33

How is the distance between the force and the pivot measured

Answer 33

Normal to the direction of the force

Question 34

What is the equation for the moment of the force

Answer 34

Moment of a force = force x distance normal(perpendicular) to the direction of the force

Question 35

What something is balanced, it is said to be in what

Answer 35

Equilibrium

Question 36

What is the equation for when a system involving rotational forces is in equilibrium

Answer 36

Sum of clockwise moments = sum of anti-clockwise moments

Question 37

What is the horizontal line/beam called

Answer 37

Lever

Question 38

What is a lever

Answer 38

A bar that pivots about a point and used to transfer a force

Question 39

How can the rotational effect of a force also be transmitted

Answer 39

By gears