Momentum and Impulse

A 0.250 kg cart moving at 0.400 m/s has how much momentum?

• 0.1 kg-m/s
• 1 kg-m/s
• 10 kg-m/s
• 100 kg-m/s

Tags

NGSS.HS-PS2-2

A 2 kg cart has a momentum of 10 kg m/s. What is its velocity?

• 22 m/s
• .2 m/s
• 5.0 m/s
• 20 m/s

Tags

NGSS.HS-PS2-2

A runner has a momentum of 670 kg m/s and is traveling at a velocity of 9 m/s. What is his mass?

• 6030 kg
• 0.0134 kg
• 74.4 kg
• 80 kg

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Impulse is defined as an object's and is determined by how much is applied to the object over how much .

• change in momentum; force;time

• force; time; change in momentum

• time;change in momentum; force

• change in momentum; time; force

Tags

NGSS.HS-PS2-2

What does the Impulse-Momentum Theorem state?

• The total momentum of a system is conserved if no external forces act on it.

• Impulse is equal to the change in momentum of an object.

• The force acting on an object is equal to its mass times its acceleration.

• Momentum is a vector quantity that depends only on the object's mass.

Tags

NGSS.HS-PS2-2

A 50 N force is applied to an object over 20 seconds, what is the impulse the object experiences?

• 3 Ns

• 1000 Ns

• 25 Ns

• 2.5 Ns

A 50 N force is applied to an object over 20 seconds, what is the change in momentum the object experiences?

• 3 Ns

• 1000 Ns

• 25 Ns

• 2.5 Ns

Tags

NGSS.HS-PS2-2

How much force would be required to change the momentum of an object by 60 kgm/s in 6 seconds?

• 10 N

• 1200 N

• 88 N

• 36 N

Tags

NGSS.HS-PS2-1

How much time would it take a 500 N force to change the momentum of a 5 kg object by 10,000 kgm/s?

• 12 s

• 100 s

• 45 s

• 20 s

Tags

NGSS.HS-PS2-1

True or False: A force of 40-N acting for 0.1 seconds would provide an equivalent impulse as a force of 2.0-N acting for 2.0 seconds.

• True

• False

Answer explanation

Calculate impulse using J=Ft. 40*0.1=4 Ns for the first set of numbers. Then calculate J=Ft for the 2nd set of numbers...2..0*2.0 = 4 Ns. Since these numbers are the same, the impulse is equivalent.

Tags

NGSS.HS-PS2-2