Momentum Impulse Theorem

Which of the Following Statements Is Not True About Applying the Impulse-Momentum Principle to Two-Dimensional Collisions?

• If the impulse is zero, the magnitude of the system’s initial momentum equals the magnitude of its final momentum.

• If the impulse is zero, the system’s initial momentum along the x-axis equals its final momentum along the x-axis.

• If the impulse is zero, the system’s initial momentum along the y-axis equals its final momentum along the y-axis.

Tags

NGSS.HS-PS2-2

A rail car with a nonzero velocity, v, travels on a smooth track while filling with rain. Which statement about its motion is correct?

• The speed remains unchanged because the impulse of the rain is on the y-axis but the velocity is on the x-axis.

• The speed increases because the impulse the momentum of the rain plus the momentum of the train are summative.

• The speed decreases because the mass of the rail car increases so the velocity must decrease for momentum to be conserved.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The impulse on the ball is ______ N s.

• -2.5

• -10

• -18

• -45

Tags

NGSS.HS-PS2-2

A runner has a momentum of 670 kg m/s and is travelling at a velocity of 9 m/s. What is his mass?

• 6030 kg

• 0.0134 kg

• 74.4 kg

• 80 kg

Tags

NGSS.HS-PS2-2

When the speed of an object is doubled, its momentum...

• remains unchanged in accord with the conservation of momentum.

• doubles.

• quadruples.

• decreases.

Tags

NGSS.HS-PS2-2

The units for Impulse are

• N/s

• N-s

• N

• m/s

Jen (50 k g) and David (75 k g), Both on Rollerblades, Push off Each Other Abruptly. After the Push, Jen Has a Velocity of −3.0 m/s. What Is David’s Velocity?

• + 2.0 m/s

• + 3.0 m/s

• + 4.5 m/s

Tags

NGSS.HS-PS2-2

A 1000-k g Car Is Moving at 10 m/s with Respect to the Ground When the Car Hits a Barrier. The Car Is Stopped in 0.5 s by the Force of the Barrier on the Car. What Is the Magnitude of the Average Force the Barrier Exerted on the Car During the Collision?

• 2000 N

• 5000 N

• 20,000 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A 2-kg Rubber Ball with an Initial Speed of 10 m/s Bounces off a Wall. Immediately After the Bounce, the Ball Has a Speed of 5 m/s. What Is the magnitude of the ball's change in momentum?

• 10 kg m/s

• 20 kg m/s

• 30 kg m/s

Tags

NGSS.HS-PS2-2

The momentum of an object depends upon the object's ___________&_____________.

• size and shape

• mass and speed

• mass and veloctiy

• mass and energy

Tags

NGSS.HS-PS2-2