Newton's 2nd Law a = Fnet / mass

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 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

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-PS2-2

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.

Find how much force the man will need to exert to move the car.

• 5000 N

• 50 N

• 20,000 N

• 500 N

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

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

Tags

NGSS.MS-PS2-2

What unit do we measure force in?

• Kilometer/hr

• Joules

• Seconds

• Newtons

Upon what two factors does an object's weight depend?

• mass of the object

• the objects acceleration

• the gravitational field

• size of the object

• velocity of the object

Tags

NGSS.MS-PS2-4