2nd Law of Motion: Mass vs Weight

The force exerted perpendicular to the surface an object rests on is known as:

• the normal force.

• friction.

• gravity.

• the electromagnetic force.

The gravitational force that an object exerts due to its mass is called:

• weight.

• mass.

• friction.

• acceleration.

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NGSS.MS-PS2-4

What can be said about forces when an object is accelerating?

• They are unbalanced.

• They are balanced.

• They are non-existent.

• They are infinite in magnitude.

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NGSS.MS-PS2-2

According to this free body diagram, in which direction is the block moving?

• to the right

• to the left

• upward

• downward

Tags

NGSS.MS-PS2-2

A force is not needed to keep an object in motion.

• True

• False

• Unknown

Tags

NGSS.MS-PS2-2

Newton's 2nd Law states that F = ma.

In the free body diagram above, what would happen if the forces were unchanged but the object were more massive?

• The object would accelerate at a slower rate.

• The object would accelerate at a faster rate.

• The object would lose mass.

• The object would become even more massive.

Tags

NGSS.MS-PS2-2

An astronaut with all of the necessary gear has a weight of 2,250 N on Earth (acceleration due to gravity on Earth is 9.8 m/s/s). If the acceleration due to gravity is 1.63 m/s/s on the Moon, what would the astronaut weigh on the surface of the Moon?

• 375 N

• 519 N

• 950 N

• 2150 N

Tags

NGSS.MS-PS2-4

What is the mass of an object that accelerates at a rate of 2.45 m/s² with an applied force of 150 M?

• 61.2 kg

• 36.0 kg

• 131.3 kg

• 211.1 kg

Tags

NGSS.MS-PS2-2

What is the acceleration of an object with a mass of 350 kg with an applied force of 620 N?

• 1.77 m/s²

• 0.68 m/s²

• 2.83 m/s²

• 3.45 m/s²

Tags

NGSS.MS-PS2-2

What is the net force?

• 5000 N right
• 4000 N right
• 40 N left
• 4000 N left

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1