Multiple Forces Ashley grade 5 science

Label the Forces on the Bicycle

a

b

c

normal force

friction

gravity

Why do you think that Force A is friction?

• A. Because it helps the bicycle go faster on the road.
  

• B. Because it points in the same direction as the motion.
  

• C. Because it points opposite to the bicycle's movement.
  

• D. Because it supports the rider from below.

Why do you think that Force B is gravity, because the arrow points downward?

• A. Because the arrow points down, it shows the ground is pushing up.
  

• B. Because the arrow points down, it shows the bike is turning.

• C. Because the arrow points down, it shows the Earth is pulling the bike and rider.

• D. Because the arrow points down, it shows the air is pushing behind.

Why do you think that Force C is the normal force, because the arrow points upward?

• A. Because the arrow points up, it shows the bike is moving forward.
  

• B. Because the arrow points up, it shows the air is pushing upward.

• C. Because the arrow points up, it shows the legs are lifting the rider.
  

• D. Because the arrow points up, it shows the road is pushing to support the bike

What force will act on Arun if he is riding his bicycle on a windy day?

• A. Gravity, because it helps him move faster.
  

• B. Normal force, because it pushes him forward.
  

• C. Air resistance, because the wind pushes against his motion.
  

• D. Thrust, because the pedals stop working.

What must Arun do to overcome the force from the wind?

• A. Pedal slower to make it easier to ride again.
  

• B. Pedal faster to push against the blowing wind.
  

• C. Turn the bike to avoid the blowing wind.
  

• D. Stop riding and wait until the wind is gone.

Why does an aeroplane need the force of lift?

• A. Because lift helps the plane turn left and right in the air.
  

• B. Because lift pushes the plane backward to slow it down.
  

• C. Because lift helps the plane rise up from the ground.
  

• D. Because lift keeps the engine running during flight.

What part of the aeroplane helps create the lift force?

• A. The wheels, because they help the plane roll.
  

• B. The tail, because it balances the plane.
  

• C. The wings, because they help lift the plane off the ground.
  

• D. The lights, because they guide the pilot at night.

Write the correct four forces that act on an aeroplane when it's flying.

Answer explanation

Which two forces are natural forces?