Impuse & Momentum

What is the unit for momentum?

• kg●m/s

• N●kg

• kg●m/s²

• N●m/s

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

• 500 kg●m/s

• 10 020 kg●m/s

• 20 000 kg●m/s

• 99 980 kg●m/s

The total momentum of two objects before collision is 50 kg. m/s. What will be their total momentum after collision?

• 50 kg●m/s

• 175 kg●m/s

• 350 kg●m/s

• not enough information

Which of the following statements describes momentum?

• It is the product of body’s mass and velocity.

• It is the product of body’s mass and acceleration.

• It is the sum of body’s mass and velocity.

• It is the sum of body’s mass and acceleration

What is impulse?

• The change in volume of an object.

• The change in momentum of an object

• The original momentum of the object.

• A force applied to an object for a period of time.

A bus and a car are travelling at the same velocity. Which of the two vehicles has greater momentum?

• the car

• the bus

• cannot be determined

• both have the same momentum

Two identical cars are moving at different speeds and collided with a tree. Car A caused greater damage on the tree than Car B. Why is this so?

• Car A is moving faster therefore its impact force is higher.

• Car A is moving slower therefore its impact force is higher.

• Car B is heavier than Car A so it creates less damage.

• None of these

Why should the driver reduce speed when he/she sees a “curve” road sign?

• They need to reduce speed to prepare to stop to prevent accidents to happen.

• They need to reduce speed to gain more momentum to prevent accidents to happen.

• They need to reduce speed to lower the momentum to prevent accidents to happen.

• They need to reduce speed to increase the momentum to prevent accidents to happen.

Rayleigh is moving with a velocity of 2 m/s. After he bumped into another person his velocity decreases. What causes the sudden change in his velocity?

• acceleration

• impulse

• inertia

• momentum

Which of the following has the greatest momentum?

• A boat sailing in the sea

• A car going down the hill

• An airplane parked on a hangar

• A skater moving slowly on a flat road