G9 MX8 Reviewer

Which of the following statements describes momentum?

• the product of body’s mass and velocity

• the product of body’s mass and acceleration

• the sum of body’s mass and velocity

• the sum of body’s mass and acceleration

What type of quantity are momentum and velocity?

• director

• reactor

• scalar

• vector

What is the unit for momentum?

• kgm/s

• kgm/s²

• Nkg

• Nm/s

What word can best describe the total momentum in an isolated system?

• constant

• large

• lost

• low

Calculate the momentum of a car, which has a mass of 1000 kg and moves with a velocity of 20 m/s.

• 500 kgm/s

• 10, 020 kgm/s

• 20000 kgm/s

• 99 980 kg m/s

The total momentum of two objects before collision is 450 kgm/s. What will be their total momentum after collision?

• 0 kgm/s

• 175 kgm/s

• 350 kgm/s

• 450 kgm/s

Two objects with a total mass of 20 kg has an initial momentum of 100 kg∙m/s. If the masses stick together after the collision, what is the final velocity of the masses?

• 1 m/s

• 5 m/s

• 50 m/s

• 100 m/s

Two billiard balls with mass 1.0 kg each are travelling towards each other. The first one is moving at a velocity of 3 m/s, while the other one moves at a velocity of -2m/s. After the collision, one billiard ball moves to the left at a speed of 2 m/s. What is the speed of the other ball?

• -3 m/s

• -2 m/s

• 2 m/s

• 3 m/s

In any collision (crash) the ______ is ALWAYS constant

• Total Momentum
• total speed
• total Velocity
• Energy

A big fish swims upon and swallows a small fish at rest. After lunch, the big fish has less

• momentum
• velocity
• mass