Understanding Frictional Forces

What is the main topic discussed in the video?

• The properties of light

• The laws of thermodynamics

• The direction of frictional force on a runner's shoe

• The concept of gravity

Which statement is true about frictional force?

• It always acts in the direction of motion

• It is not a contact force

• It always opposes motion

• It acts only on stationary objects

What is a common misconception about the direction of frictional force?

• It acts in the same direction as motion

• It acts in the opposite direction of the object's motion

• It does not affect moving objects

• It acts perpendicular to the motion

How does the runner's shoe move when the runner is moving forward?

• The shoe moves sideways

• The shoe remains stationary

• The shoe moves backward

• The shoe moves forward

What is the correct direction of the frictional force acting on the runner's shoe?

• Towards the right

• Towards the left

• Upwards

• Downwards