Newton's 2nd law

What is Newton's 2nd Law?

• Every action has an equal and opposite reaction

• An object at rest stays at rest, an object in motion stays in motion.

• F = ma

• Friction

Your car has a mass of 2500 kg and a force of 5000 N. How fast will it accelerate?

• 20 m/s²

• 0.5 m/s²

• 2 m/s²

• 120 N

If the man pushes with an equal amount of force, which object will accelerate more?

• Car because it has more mass

• Lawnmower because it has less mass

• Car because it has less mass

• Lawnmower because it has more mass

A 25 kg bike accelerates at 10 m/s². What was the force?

• 250 N

• 2.5 N

• 25 N

• 15 N

What unit do we measure force in?

• Kilometer/hr

• Joules

• Seconds

• Newtons

What is force?

• A push on an object

• A pull on an object

• A push or pull on an object

If an object was accelerating at 5 m/s², and a force of 10 newtons was required to accelerate it, what was the object's mass?

• 50 kg

• 2 kg

• 0.5 kg

• 5 kg

A 20-N net force acts on an object with a mass of 2.0 kg. What is the object's acceleration?

• 10 m/s²

• 0.1 m/s²

• 40 m/s²

• 22 m/s²

What is the mass of a motorcycle that accelerates at 4 m/s² when a net force of 400 N is applied to it?

• 1600 kg

• 100 kg

• 0.01 kg

• 396 kg

A winch is supplying a force of 100 N on a large 50-kg crate to move it along a trailer bed. There is also a 50 N frictional force acting in the opposite direction. What is the acceleration of the crate?

• 0 m/s²

• 10 m/s²

• 1 m/s²

• 2 m/s²