3.1 MOMENTUM & IMPULSE

Momentum is defined as the product of mass, m and the

• Impulse, J

• Acceleration, a

• Velocity, v

• Distance, s

The units of Impulse is

• N/s

• Ns

• N

• m/s

An object with a mass of 2500 kg at rest has what momentum ?

• 2500 m/s

• 2505 kg

• 0 kg m/s

• 2500 kg m/s

Tags

NGSS.HS-PS2-2

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

• 20 m/s

• 0.2 m/s

• 5.0 m/s

• 22 m/s

Which object listed below has the greatest momentum ?

• A 0.05 kg object rolling at 0.2 m/s

• A 0.15 kg object rolling at 2 m/s

• A 0.15 kg object rolling at 1 m/s

• A 0.4 kg object rolling at 2 m/s

The impulse-momentum theorem states that

• The force on a moving object is equal to the magnitude of the impulse

• The impulse on an object is equal to the change in momentum, p of the body

• The impulse on an object is greater than the change in momentum it causes

• The impulse on an object is less than the change in momentum it causes

A boy kicks football with a force of 20 N, the time the force acts for is 0.3 s. Calculate the impulse on the ball

• 60 Ns

• 1 Ns

• 6 Ns

• None of these

Impulse =

• Shaded area under F-t graph

• Area of shaded region

• Shaded area under a-t graph

• None of these

The equation to calculate momentum is

• p = 1/2 mv^2

• p = mgh

• p = mg

• p = mv

A 1 kg kick ball flying at 10 m/s hits a wall and bounces off at 8 m/s. What is the impulse ?

• 2 kg m/s

• 18 kg m/s

• 31 kg m/s

• 25 kg m/s