Forces

Question 1

Forces can be a….. or a ……

Answer 1

Push or pull

Question 2

Name four contact forces

Answer 2

Friction,upthrust, air/water resistance, reaction force

Question 3

Which piece of equipment do you measure forces with

Answer 3

Newton metre

Question 4

What unit do we measure force in

Answer 4

N (newton)

Question 5

What is the name of the support from a solid object

Answer 5

Reaction force

Question 6

When you apply a force to the solid what happens to the bonds in the solids

Answer 6

They get compressed

Question 7

What does the word extension mean when describing an electric material

Answer 7

How far the material stretches

Question 8

What is the elastic limit of a material

Answer 8

Where the material stretches so far it can’t go back to its original length

Question 9

What is the name of the pull force within a stretched spring or elastic material

Answer 9

Tension

Question 10

Which force resistance movement when two materials are in contact

Answer 10

Friction

Question 11

Give 2 examples of when friction is useful

Answer 11

Walking braking writing on paper sandpapering

Question 12

How can you reduce the friction between 2 surfaces

Answer 12

Lubrication eg oil wax grease water

Question 13

Water and air resistance are both part of what force

Answer 13

Drag

Question 14

Why is it harder to run through water than on land

Answer 14

It means you have to push more particles out the way because water is more dense than air

Question 15

How are sports cars and many marine animals adapted to reduce drag in water

Answer 15

They are streamlined

Question 16

Why does a parachute help a skydiver increase drag in the air

Answer 16

It has larger surface area to hit more particles to slow them down

Question 17

What do we call the area around an object in which the efffect of non contact forces are felt

Answer 17

A field

Question 18

As you get further away from a force field what happens to the strength of the force

Answer 18

It gets weaker

Question 19

What is the difference between mass and weight

Answer 19

Mass is how much matter/atoms/stuff an object is made from. Weight is the force due to gravity has pulling the object’s mass

Question 20

What is the name of the single force which represents the combined effect of all the forces acting on the object

Answer 20

Resultant force

Question 21

If 2 forces acting on the object in opposite directions are the same size what would happen to the object

Answer 21

Either not move or move at a constant speed

Question 22

What do we call an object that has equal sized pairs of forces acting upon it

Answer 22

In equilibrium

Question 23

If 2 forces acting on an object in opposite directions and are not the same size what would happen to the object

Answer 23

It would change speed: accelerate/ speed up or decelerate/ slow down