Forces

Question 1

What is friction 😀

Answer 1

• the force exerted by a surface as an object moves across it.
• it results from the two surfaces being pressed together closely, causing attractive forces between molecules
• slows down or prevents movement

Question 2

Air resistance 😭

Answer 2

• a frictional force which acts upon objects as they travel through the air.

Question 3

Push force 😡

Answer 3

• a force on someone or something in order to move them away from oneself.

Question 4

What is a force? 🤔

Answer 4

• three types: push, pull or twist.
• start motion, stop motion, speed up motion, slow down motion, change the direction of motion and change the shape of an object.
• we cannot see forces
• ## act in pairs

Question 5

Pull force 🙄

Answer 5

• a force on someone or something so as to cause movement towards oneself

Question 6

Twist 😇

Answer 6

• to bend, curl or distort a shape

Question 7

Turn (just in case) 🍗

Answer 7

• to move in a circular direction partly or completely around an axis or a point

Question 8

Balanced force 👍

Answer 8

• when the pushing or pulling forces of an object in one direction are the same size as the forces acting in the opposite direction are the same the forces are balanced

Question 9

Unbalanced force 👍🏿

Answer 9

• the tension that is pulling a force one one side of an object is stronger than the force in the opposite direction on the other side

Question 10

Contact force 🍔

Answer 10

• needs to touch an object before they can affect it

- e.g. friction, air resistance, applied force and up thrust

Question 11

Non-contact force 🍾

Answer 11

• can affect an object from a distance

- e.g. Gravitational, electrical, magnetic forces

Question 12

Mass 🤖

Answer 12

• a large body of matter with no definite shape, measured in kilograms

Question 13

Weight 👄

Answer 13

• taken to be a force on the object due to gravity

- weight is measured in kilograms (kg) or grams (g).

Question 14

General properties of magnets ✍

Answer 14

• A magnet has two opposite poles.
• Two similar poles repel each other.
• The two poles are invisible.

Question 15

Describe frictional force as a contact force that opposes motion. 💪

Answer 15

friction force is the force exerted by a surface as an object moves across it or makes an effort to move across it.

Question 16

what is forced measured in 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏

Answer 16

• newtons (N)

Question 17

what is a spring scale 💀

Answer 17

• is used to measure the size of a pushing force

- a spring compresses or is squashed when a pushing force acts on it

Question 18

What is a spring balance 😷

Answer 18

• is usedto measure the size of a pulling force

- a spring stretches when a pulling force acts on it

Question 19

How to convert mass to force 😓

Answer 19

1kg -> (multiply by10N)

1g -> newtons (divide by 100N)

Question 20

What is the net force of an object 😪

Answer 20

The sum of the forces

Question 21

what is the final force called 😧

Answer 21

The resultant (the difference in the forces)

Question 22

What is up thrust 😊😌

Answer 22

• an upwards force and acts in the opposite direction to gravity