4wks Test Retake

What is the equation for momentum?

• p=mv

• m=p/v

• v=p/m

• Ft=mv

the letter p represents?

The equation for momentum regarding force is...

• p=mv

• F=ma

• Ft=mv

• V=d/t

the letter J represents what?

which object has the least momentum?

• Godzilla (3000kg) going 300m/s E

• a T-rex with mass 500kg and velocity 150 m/s N

• a car that ways 30 kg and is going 15 m/s W

• a truck with mass 50 kg going 50 m/s W

• a bird with mass 2 kg and velocity 50 m/s S

What is the main difference between an elastic and inelastic collision?

• one is rubber the other is metal

• one is a collision and the other is not

• elastic is where the two objects are stuck and inelastic is where they remain separate

• elastic is where two objects remain separate and inleastic is where the two are stuck

two cars driving towards each other hit each other and are on opposite sides of the street. the first car has mass of 20kg and a velocity of 30m/s. the second car has a mass of 30kg and a velocity of 35m/s. After the collision the first car has a velocity of 20 m/s. what is the final velocity of the second car? (round to nearest whole number)

• 42 kg*m/s

• 43 kg*m/s

• 20 m/s

• 30 kg*m/s

two cars are going towards each other and collide so hard that they are stuck together. the first car has a mass of 50kg and is going 30 m/s. the second car is 40kg and is going 20m/s. What is their velocity after they collide? (round to nearest tenth)

• 30 m/s

• 30 kg*m/s

• 27 kg*m/s

• 25.6 kg*m/s

the definition of momentum is

• momentum is movement

• gravity

• mass in motion

• distance by speed

the definition for impulse is

• mass in motion

• the change in momentum

• godzilla roar!

• mass time acceleration