Applications of Newton's Second Law

A 50-kg crate is pushed with a horizontal acceleration of 20 m/s². What net force is acting on the crate?

• 2.5 N

• 0.4 N

• 1000 N

• 30 N

Tags

NGSS.MS-PS2-2

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

Tags

NGSS.MS-PS2-2

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

Tags

NGSS.MS-PS2-2

A 10-kg crate is pushed across a frictionless surface with a force of 30 N. What is its acceleration?

• 300 m/s²

• 3 m/s²

• 20 m/s²

• 0.33 m/s²

Tags

NGSS.MS-PS2-2

A 20-kg crate is being pushed across a floor with a force of sliding friction of 20 N. If the pushing force is also 20 N, what is the acceleration of the crate?

• 0 m/s²

• 2 m/s²

• 0.5 m/s²

• 40 m/s²

Tags

NGSS.MS-PS2-2

A winch is supplying a force of 100 N on a large 50-kg crate to move it along a trailer bed with a friction force of 50 N. What is the acceleration of the crate?

• 0 m/s²

• 10 m/s²

• 1 m/s²

• 2 m/s²

Tags

NGSS.MS-PS2-2

A 75-kg skydiver who has not yet opened his parachute is falling at terminal velocity. What is the magnitude of air resistance force that is acting on him?

• about 75 N

• 0 N ... air is too light to exert any forces

• 750 N

• 10 N

Tags

NGSS.MS-PS2-2

What is the weight on Earth of a labrador retriever that has a mass of 30 kg?

• 30 N

• 30 lbs

• about 300 lbs

• about 300 N

Tags

NGSS.MS-PS2-4

A person who has a mass of 60 kg on Earth will have a mass of ________ on the moon.

• less than 60 kg

• 60 kg

• more than 60 kg

• less or more mass on the moon it just depends on whether she has fallen into a crater or is standing on top of a hill.

Tags

NGSS.MS-PS2-4

A sled dog supplies a pulling force of 100 N to a 40 kg sled and the sled accelerates at 2 m/s². What is the force of sliding friction between the sled and the snow?

• -5 N

• -10 N

• -20 N

• -40 N

Tags

NGSS.MS-PS2-2