Impulse Physics

What are the 2 expressions used for impulse?

• Ft

• mv

• m/v

If an airbag changes a 60 kg person's speed from 40.0 m/s to 0.0 m/s, what impulse must act on the person?

Impulse = m*v

• 2400 kg.m/s

• 1.5 kg.m/s

• 0.67 kg.m/s

• 1500 kg.m/s

Tags

NGSS.HS-PS2-1

Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other,...

• Skater 1 experiences a greater change in momentum

• Skater 2 experiences a greater change in momentum

• Skater 1 has a greater velocity than Skater 2

• Skater 1 experiences a greater force

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

What impulse would be needed to stop a 1500 kg car traveling at 20 m/s? Impulse = m*v

• 7500 Ns.

• 15,000 Ns.

• 30,000 Ns.

Tags

NGSS.HS-PS2-2

Four students run up the stairs in the time shown. Which student has the largest power output?

• A

• B

• C

• D

A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The impulse on the ball is ______ N*s.

Impulse = F*t

• -2.5

• -10

• -18

• -45

Tags

NGSS.HS-PS2-1

When two objects collide their motion changes. Why does this happen?

• energy was transferred from one object to the other

• their gravity changed

• the objects lose mass

Tags

NGSS.MS-PS2-1

NGSS.MS-PS3-5

If a charging elephant has kinetic energy, it must also have

• potential energy

• momentum

• work

• all of these

Tags

NGSS.HS-PS2-2

NGSS.HS-PS3-2

What is impulse a measure of in physics?

• The overall effect of a force acting over time

• The distance covered by an object in motion

• The amount of energy an object has due to its motion

• The rate at which an object changes its velocity

Tags

NGSS.HS-PS2-3

What is the impulse experienced by a soccer ball when it is kicked with a force of 1,200 N for 0.015 seconds?

• 18 Ns

• 80 Ns

• 180 Ns

• 800 Ns

Tags

NGSS.HS-PS2-1