Key Words

Question 1

Distance

Answer 1

Speedxtime

Question 2

Speed

Answer 2

Distance x time

Question 3

Time

Answer 3

Distance x speed

Question 4

Scalar

Answer 4

?

Question 5

Vector

Answer 5

?

Question 6

Displacement

Answer 6

?

Question 7

Velocity

Answer 7

?

Question 8

Distance-time graph

Answer 8

?

Question 9

Acceleration

Answer 9

The change in velocity per second is known as the acceleration of the body

Question 10

Force is what?

Answer 10

A force is anything which causes an object to change its velocity

Question 11

Four advantages of friction?

Answer 11

Advantages of friction:
Friction enables us to walk freely.
It helps to support ladder against wall.
It becomes possible to transfer one form of energy to another.
Objects can be piled up without slipping.
Breaks of vehicles work due to friction.

Question 12

Weight is a what?

Answer 12

When gravity acts on our mass, we can find our weight, so gravity is a force.

Question 13

What is mass measured in?

Answer 13

Mass is measured in kilograms, acceleration due to gravity is measured in m/s2, and as weight is a force, it is measured in Newtons.

Question 14

Force =?

Answer 14

Force = mass x acceleration

Question 15

Gravity’s number is always?

Answer 15

Gravity’s number is always 10.

Question 16

What is Hooke’s law?

Answer 16

Hooke’s law states that the extension of an elastic body (a spring) is directly proportional to the force applied to it.
This means that for example if you add 5g to a spring it will stretch a certain amount and if you add another 50g it will stretch by the same amount.