Forces and motion

Question 1

how to work acceleration?

Answer 1

acceleration = change in velocity / time taken

Question 2

How do you calculate the average speed

Answer 2

average speed = distance moved / time taken

Question 3

how to work average speed?

Answer 3

average = distance moved / time taken

Question 4

how to work force?

Answer 4

force = mass (times ) acceleration F = m (times) a

Question 5

how to work weight?

Answer 5

weight = mass (times) gravitational field strength 
W = m (times) g

Question 6

What is speed means

Answer 6

how fast you are going with no regard to the direction

Question 7

Gradient = ??

Answer 7

Gradient = y-axis/x-axis

Question 8

What are the units of mass ? And of weight ?

Answer 8

units of mass= kg units of weight = N

Question 9

What are the units of acceleration ?

Answer 9

m/s 2

Question 10

What is represented by the gradient of a velocity-time graph?

Answer 10

acceleration

Question 11

A force is simply a ___ or ___

Answer 11

push or pull

Question 12

Friction is found nearly everywhere , ____and____moving object

Answer 12

slowing down and stopping

Question 13

Give the name of the force that pulls objects towards the centre of the Earth?

Answer 13

weight/gravitational force

Question 14

What are electrostatic forces?

Answer 14

Forces of attraction or repulsion between two charged object.

Question 15

What is static friction?

Answer 15

Friction between solid surfaces which are gripping.

Question 16

Suggest how putting bikes on the roof of a car would affect its top speed

Answer 16

The bikes would make the shape of the car less streamlined, which would increase the drag and reduce the top speed.