Momentum, Impulse and Force

A car travelling at 12 m/s has a momentum of 14 400 kg m/s. Calculate its mass. Type your answer together with the unit in kg.

Tags

NGSS.HS-PS2-2

Select the two units for impulse

• N/s

• Ns

• kg/ms

• kg m/s

Tags

NGSS.HS-PS2-2

Impulse = ....

• Ft

• lup u

• Ft = mv - mu

• mv - mu

Tags

NGSS.HS-PS2-3

An athlete with a mass of 65 kg takes 1.5 s to slow down from a speed of 10.0 m/s to a speed of 4.0 m/s.

Calculate the average resultant force applied to the athlete as he slows down.

Write your answer with the correct unit.

Tags

NGSS.HS-PS2-1

An object with a mass of 50 kg takes 20 s to speed up from a speed of 320.0 m/s to a speed of 400.0 m/s. Calculate the average resultant force applied to the object as it speeds up. Write your answer with the correct unit.

Tags

NGSS.HS-PS2-1

Define impulse (2 nswers)

• force x acceleration

• force x time

• a change in marmaladum

• a change in momentum

Tags

NGSS.HS-PS2-2

Select the two equations for impulse

• Ft

• (v2 - v1) / t

• mv - mu

• ma

The equation to calculate momentum is

• p=mv

• p=1/2mv²

• p=mgh

• p=mg

Tags

NGSS.HS-PS2-2

The impulse is _____the change in momentum

• Greater than

• Equal to

• Less than

• Always double

Tags

NGSS.HS-PS2-2

Determine the momentum of 1000-kg car moving northward at 20 m/s.

• 20000 N

• 20000 Joules

• 20000 Kg * m/s

• 20000 kg * m/s north

Tags

NGSS.HS-PS2-2