Forces & Motion

Definition of Force

• strength or energy as an attribute of physical action or movement.

• make (someone) do something against their will.

• coercion or compulsion, especially with the use or threat of violence.

Diffrent type of forces

(Choose all that apaly)

• Gravitational Force

• Friction Force

• Tension force

• Contact force

The effect of friction force on the motion of objects.

• Opposes the motion of an object causing moving objects to gain energy and get faster

• opposes the motion of an object, causing moving objects to lose energy and slow down

• Opposes the motion of an object causing moving objects to gain energy and get slower

The effect of balanced and unbalanced forces on different objects. 

• Balanced forces do not result in any change in motion

• Unbalanced forces do no result in any change in motion

• Balanced forces result in change of motion

Which of the following is an example of friction that is helpful?

• Brakes used on a bike

• Tires from a car on the road

• All are examples that are helpful

Oil between machine parts would be an example of which type of friction?

• sliding

• fluid

• rolling

Friction is a force that acts in an ___________ direction of movement.

• opposite

• similar

A type of friction that occurs when air pushes against a moving object causing it to negatively accelerate

• surface area

• air resistance

• descent velocity

• gravity 

What force stretches a material apart?

• none of the above

• Compression

• squeezing

• tension

Which type of friction occurs when an object moves through a liquid or gas?

• fluid

• static

• rolling

• sliding