Net Force and Newton's 2nd Law

Which best describes Newton's 2nd Law of Motion?

• An object in motion stays in motion and an object at rest stays at rest, unless acted upon by an unbalanced force

• An object acted upon by an unbalanced force will accelerate in the direction of the force exerted

• Also called the Law of Inertia

• For every action there is an opposite and equal reaction

An object is being pushed to the right with a force of 25 N and to the left with the force of 10 N. What is the net force?

• 35 N right

• 35 N left

• 15 N left

• 15 N right

Carl is pushing his refrigerator to the right with a force of 22 N;. His friend Carlos is pushing in the same direction with 12N of force. What is the net force?

• 10 N left

• 34 N right

• 34 N left

• 10 N right

Paula is pushing her couch to the left across the room with a force of 33N. Her 2 kids are pushing the couch in the opposite direction, one with a force of 8N and the other with 9N. What is net force?

• 16N right

• 42N right

• 16N left

• 42N left

Speed with direction is the definition for:

• speed

• acceleration

• velocity

• inertia

Which is not using the correct unit?

• Force = 18 newtons

• Acceleration = 18 m/s

• Mass = 18 kg

Acceleration includes all of the following except:

• speeding up

• changing direction

• slowing down

• all of the above are true

An object with a mass of 20 kg accelerates at 5m/s squared. What is the force?

• 100 N

• 100 kg

• 4 N

• 4 kg

An object accelerates at 2 m/s squared when a force of 8 newtons is applied to it. What is the mass of the object?

• 16 kg

• 16 N

• 4 kg

• 4 N

An object with a mass of 8 kg has a force of 32 N applied to it. What is the resulting acceleration of the object?

• 256 kg

• 4 m/s squared

• 4 kg

• 256 m/s squared