SCA3_Forces

Which is a contact force?

• magnetic force

• gravitational force

• frictional force

• electrostatic force

Frictional force acts in the ________ direction to the applied force.

Draw the frictional force acting on the box.

Which is a way to increase friction between two surfaces?

• add grooves to the surfaces

• apply lubricant

• polish the surfaces

• use ball bearing

Which of the following is gravitational force?

• mass

• weight

• volume

• time