UNIT 3 Force and Energy

What is Oliver's weight? (Use the principle of moments)

• 450 N

• 500N

• 600N

• 800N

Between which two points does John stop for a rest?

• A and B

• B and C

• C and D

• D and E

What will happen if Oliver's weight is 480 N and he moves back about 0.5 m?

• The see-saw will drop on the left

• The see-saw will drop on the right

• The see-saw will be balanced

• The see-saw will spin

How much pressure Pierre exerts on the ground as he stands upright?

• 13.000 N/m2

• 12.000 N/m2

• 
  10.000 N/m2

• 11.000 N/m2

What is the difference between the pressure exerted by Pierre and Rajiv?

• 500 N/m2 heavier for Pierre

• 1000 N/m2 heavier for Pierre

• 
  500 N/m2 heavier for Rajiv

• 
  1000 N/m2 heavier for Rajiv

Blessy races  four snails, A, B, C, and D.

She draws a distance/time graph for each of the four snails.

The distance of the race is 50 cm.

Which snail wins the race?

• A

• B

• C

• D

A toy car travels a distance of 25 meters in 5 minutes.

What is the average speed of this toy car?

• 5 m/min

• 125 m/min

• 25 m/min

• 30 m/min

In what time the speed of traveller B is 0 cm/minute?

• From 0 to 0.5 minutes

• From 0.5 to 3 minutes

• From 1 to 2.5 minutes

• From 3 to 4 minutes

A fish is in water. The water exerts pressure on the fish.

Which of this causes pressure on the fish?

• The weight of water beside the fish

• The weight of water all around the fish

• The weight of water below the fish

• 
  The weight of water above the fish

The air exerts a pressure on the sides of the bottle. 

How does air exert a pressure?

• Gas particles are colliding with the bottle

• Gas particles are vibrating itself

• The bottle is vibrating itself

• The bottle particles are colliding each other