Momentum Collisions and Impulse

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

• 1 N*s

• 6 N*s

• 33.3 N*s 

• None of these

Tags

NGSS.HS-PS2-1

Most modern vehicles have padded dashboards. This reduces collision injuries by...

• reducing the driver's change in momentum

• increasing the driver's change in momentum

• increasing the force of impact

• increasing the time of impact

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

A bowling ball with a mass of 7.0 kg strikes a pin that has a mass of 2.0 kg. The pin flies forward with a velocity of 6.0 m/s, and the ball continues forward at 4.0 m/s. What was the original velocity of the ball?

• 3.3 m/s

• 4.0 m/s

• 5.7 m/s

• 6.6 m/s

Tags

NGSS.HS-PS2-2

A hammer applies a force of 250 N over a time period of 0.10 seconds. What is the impulse of the hammer

• 2.5 N_*s

• 2500 N_*s

• 250 N_*s

• 25 N_*s

An inelastic collision is when

• two objects stick together after colliding

• two objects bounce off of each other when colliding

Tags

NGSS.HS-PS2-2

In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other.  The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s.  The carts stick together when they collide.  Calculate their final speed.

• 0.5 m/s

• 1.0 m/s

• 0.33 m/s

• 0.67 m/s

Tags

NGSS.HS-PS2-2

A 3,000 kg truck moving at +10 m/s hits a 1,000 kg parked car which moves off at +15 m/s after the collision. What is the velocity of the truck after the collision?

• 10 m/s

• 0 m/s

• 5 m/s

• 2 m/s

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1

Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?

• car

• bike

• they are equal

• cannot determine using the info provided

Tags

NGSS.HS-PS2-2

Two skaters initially at rest push against each other so that they move in opposite directions. When they begin moving, which skater will have a greater velocity?

• the smaller skater will have the greater velocity

• the larger skater will have the greater velocity

• they will have the same velocity

• it is impossible to tell given the limited information

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1

Suppose a girl is standing on a frozen pond where there is no friction between her feet and the ice. What must she do in order to get off the ice?

• Bend over touching the ice in front of her, then bring her feet to her hands.

• Get on her hands and knees and crawl off the ice.

• Throw something in the direction opposite to that in which she wants to go.

• Walk very slowly on tiptoe.

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1