Y7 Force and Motion Wrap-up Session

The unit of force is....

• meter

• meter/ second

• Newton

• forcemeter

What force that keep the boat floating?

• water's frictional force

• water's bouyant force

• air force on sail

• earth's gravitational force

What force that helps the boat move forward?

• earth's gravitational force

• air force on sail

• water's bouyant force

• water's frictional force

When force acts on an object, it may changes....

• direction

• shape

• speed

• all of the above

Friction forces can be increased by ___________

• applying lubricants

• using ball bearings

• making rough surface

• polish the surface

Which of the following is the advantage of frictional force?

• 
  produce heat

• prevents from slipping while walking

• slide easily

• produce noise

What is the magnitude of GRAVITY of the earth?

• 8 N/Kg

• 9 N/Kg

• 10 N/Kg

• 11 N/Kg

What caused the little girl to be lifted upwards and her older brother to be carried downwards?

• balance force

• unbalance force

Lynda is try to get her dog to move but she doesn't seem to be able to. This is because?

• balance force

• unbalance force

Tell the correct statement about the picture!

answer choices

• it's unbalanced force

• it will move

• the net force is zero

• it has acceleration