Newton's Laws

Four students raced toy cars on a track. The mass and acceleration of each car are recorded in the table below. Which toy car had the GREATEST applied force?

• 1

• 2

• 3

• 4

An object with a mass of 5.0 kg accelerates 8.0 m/s2 when an unknown force is applied to it. What is the amount of force?

• 40 N

• 3 N

• 1.6 N

• 0.625 N

An object accelerates at 12.0 m/s2 when a force of 6.0 newtons is applied to it. What is the mass of the object?

• 0.5 kg

• 6 kg

• 2 kg

• 72 kg

An object with a mass of 4.0 kg has a force of 20.0 newtons applied to it. What is the resulting acceleration of the object?

• 5 m/s²

• 80 m/s²

• 0.5 m/s²

• 0.2 m/s²

What is the acceleration for the diagram below?

• 5 m/s²

• 10 m/s²

• 40 m/s²

• 160 m/s²

What is the force for the diagram below?

• 600 N

• 66.7 N

• 203 N

• 150 N

Which object will have the greatest acceleration?

• 
• 
• 
• 

The masses of four vehicles and the net forces acting on them as they enter a highway are recorded in the table.

Which vehicle has the greatest acceleration as it enters the highway?

• Sedan

• Coupe

• SUV

• Truck

According to Newton’s third law of motion, if someone jumps off a skateboard, the skateboard will roll backward because–

• the mass of the skateboard is the same as the mass of the person jumping off.

• the pull of gravity on the person is the same as the pull on the skateboard, regardless of size.

• the air resistance on the person is great, and the friction on the skateboard is small.

• for the force that sent the person forward, there is an equal force pushing back on the skateboard.

Newton’s first law of motion, applied to a book sitting on a table, would explain that the book will not move until which of the following conditions is met?

• Gravity on the book can be reduced to zero.

• Unbalanced forces act on the book.

• Balanced forces act on the book.

• Friction is exerted on the book.