Forces and Motion Concepts

What is the relationship between inertia and mass?

• Inertia is independent of mass.

• Inertia decreases as mass increases.

• Inertia increases as mass increases.

• Inertia is the same for all masses.

According to Newton's second law of motion, if Trevor applies the same amount of force to Box A and Box B, which has a greater mass, what will happen?

• Box A will accelerate more than Box B.

• Box B will accelerate more than Box A.

• Both boxes will accelerate equally.

• Neither box will accelerate.

What explains the difference between what the observer sees and what the passenger feels in an airplane flying at a constant speed?

• The observer is stationary while the passenger is moving.

• The airplane is moving faster than the speed of sound.

• The observer is in a different time zone than the passenger.

• The observer and the passenger are in different frames of reference.

As Clinton walks, he pushes his shoe against the track. What is the reaction force to Clinton's shoe pushing against the track?

• The track pushes back against Clinton's shoe.

• Clinton's shoe moves forward.

• The air resistance increases.

• Clinton's shoe stops moving.

If the light pole was not moving, how did Mr. Jenkins' car get damaged?

• The car was moving and hit the pole.

• The light pole fell on the car.

• The car was parked and the pole moved.

• The car was damaged by another vehicle.

What is the force with which Ozzy's truck pulls forward?

• 2,750 newtons

• 2,790 newtons

• 2,700 newtons

• 2,800 newtons

What is the force with which the trailer pulls backward?

• 2,750 newtons

• 2,790 newtons

• 2,700 newtons

• 2,800 newtons

Kara and John each push their cart with the same force. Why does Kara's cart speed up more than John's cart when they push with the same force?

• Kara's cart has less mass, so it accelerates more.

• Kara is pushing harder than John.

• John's cart has better wheels.

• The store floor is sloped in Kara's favor.

Why do the crash test dummies' bodies continue to move forward even though the car stopped?

• Because of inertia

• Due to gravity

• Because of friction

• Due to air resistance

According to Newton's second law of motion, what is the relationship between force, mass, and acceleration?

• Force = Mass + Acceleration

• Force = Mass × Acceleration

• Force = Mass / Acceleration

• Force = Acceleration / Mass