Forces

Question 0

What is friction?

Answer 0

Friction slows down the moving object.

Question 1

What does Hooke’s law state?

Answer 1

It states that as the weight added to a spring doubles, the extension also doubles.

Question 2

What is upthrust?

Answer 2

Upthrust pushes object up in liquid.

Question 3

What is air resistance?

Answer 3

The force of an object moving though the air that causes it go slow down.

Question 4

What is driving force?

Answer 4

The force that is pushing or pulling something.

Question 5

What is reaction force?

Answer 5

Stops things from falling

Question 6

What is gravity?

Answer 6

Attracts the object to earth.

Question 7

What 2 forces is also known as drag force?

Answer 7

Air resistance and water resistance

Question 8

What is an independent variable?

Answer 8

What you Change.

Question 9

What is a dependent variable?

Answer 9

What you measure.

Question 10

What is a Newton meter?

Answer 10

Newton meters contain a spring connected to a metal hook. The spring stretches when a force is applied to the hook. The bigger the force applied, the longer the spring stretches and the bigger the reading.

Question 11

What does a Newton meter do?

Answer 11

Measures force

Question 12

What is static friction?

Answer 12

Static friction is the force needed to make an object start moving.

Question 13

What is sliding friction?

Answer 13

Sliding friction is the force needed to keep the object moving.

Question 14

Give an example of 2 contact forces?

Answer 14

Friction and surface touch

Question 15

Give 2 examples of non contact forces.

Answer 15

Gravity and air magnetism

Question 16

Name the 2 types of drag force.

Answer 16

Water resistance and air resistance

Question 17

What is streamlining?

Answer 17

Streamline is making someone or something into the most slim way possible for e.g a cyclists tucks their arms in to go faster. And streamlining reduces air and water resistance.

Question 18

What is lubrication?

Answer 18

Using oil or grease for e.g when you oil the chain of your bike the surfaces move past each other more easily.

Question 19

What would you use to measure force?

Answer 19

A Newton meter

Question 20

What are the five different things that forces can make objects move?

Answer 20

1. Speed up or start moving.
2. Slow down or stop moving.
3. Change direction.
4. Turn.
5. Change shape.

Question 21

What do balanced forces produce?

Answer 21

Not moving or moving at a constant speed.

Question 22

What do unbalanced forces do?

Answer 22

A car is speeding up or (accelerating).

Question 23

When does friction occur?

Answer 23

When two solid objects rub against each other.

Question 24

What are 3 good things about friction

Answer 24

1 friction allows the tyres on a bike to grip the roads surface.
2 It allows things to start and stop.
3 friction also let’s you grip your hands to the bike.

Question 25

Give 3 bad points of friction

Answer 25

1 it slows you down
2 limits top speed
3. Wastes energy

Question 26

What is the interaction force of friction?

Answer 26

Driving force

Question 27

What’s the interaction pair of gravity?

Answer 27

Reaction force

Question 28

What does equilibrium mean?

Answer 28

When forces are equal and opposite they are balenced

Question 29

What is weight measured in?

Answer 29

Newtons

Question 30

What is mass measured in?

Answer 30

Kg

Question 31

If you went to space would your mass chage?

Answer 31

No it always stays the same

Question 32

Does an object have the same mass wherever it goes?

Answer 32

Yes but the weight will change

Question 33

What is the weight and mass formula?

Answer 33

Weight=mass x gravity