YEAR 10 FORCES

Question 1

A man experiences a contact force from the chair he is sat on. He is stationary. The Newton’s third law pair of the contact force from the chair and the man is

Answer 1

A contact force from the man on the chair

Question 2

A man has a mass of 70kg. The gravitational field strength on Earth is 10N/kg. If the man went to Mars (gravitational field strength 4N/kg), his mass will be

Answer 2

70kg

Question 3

The crumple zones in a car can reduce the forces experienced in an accident because

Answer 3

The time taken for the change in momentum to take place is much larger

Question 4

In order for an object to move in a circle

Answer 4

A centripetal force is needed towards the centre of the circle.

Question 5

Stopping distance = braking distance + thinking distance. Which factor does not affect the think distance of a car?

Answer 5

Mass

Question 6

A badger of a mass of 0.5kg experiences a force of 5kN. What is the acceleration of the badger?

Answer 6

10000 metres per second squared

Question 7

A car with a mass of 1000kg has a momentum of 25000kg m/s. What is the velocity of the car?

Answer 7

25m/s

Question 8

Weight is measured in

Answer 8

Newtons