Physics Quiz

This is the SI unit of force:

• Meter

• Kilogram

• Meter per second

• Newton

Which statement correctly explains why force is a vector quantity?

• Forces have a direction and a magnitude

• Forces have arrows

• Forces do not need a size

• Forces always occur between to objects touching each other

Based on the list below, what type of forces does it describe:

- Applied forces

• -Punting a football

• -kicking the wall

• Contact forces

• Field forces

• Invisible forces

• Force fields

Choose the FALSE statement from the options below:

• A balanced force can cause an object to slow down

• An unbalanced force can cause an object to spin

• A balanced force can cause an object to remain at constant velocity

• An unbalanced force can cause an object to speed up

If a weightlifter standing on a weight platform gets ready for her deadlift. Her downward force combined with her gravitational force are equal to 500 N. What is the normal force that pushes into her feet from the platform?

• ON

• 500 N

• Cannot be determined

Imagine that same weight lifter in the question before. If the mass on the weight bar totalled 100 kg, what is the minimum amount of applied force she needed to lift the bar?

• 982 N

• 10.19 N

• 100 N

• 9.81 N

Newton's first law of motion states that:

• Force = mass x acceleration

• There is an equal and opposite reaction to every action

• Objects in motion or at rest will not change unless acted upon by an unbalanced force

• The faster an object is moving the more force it has

Which of the following is an example of inertia:

• Riding a skateboard

• Pulling a tablecloth out from underneath a plate and having the plate stay in place

• A rocket ship lifting off

• Throwing a football

What is the main factor that can alter an object's inertia?

• Force

• Speed

• Mass

• Distance

What is the effect of an unbalanced force on an object's motion?

• It causes the object to stop

• It changes the object's direction

• It does not affect the object's motion

• It changes the object's speed