Impulse and Momentum Review

Momentum is a ________ quantity

• scalar

• vector

Answer explanation

momentum's direction depends on the object's velocity direction.

Tags

NGSS.HS-PS2-2

Calculate the impulse experienced by a 65.8 kg halfback encountering a force of 1025 N for 0.350 seconds.

• 2928 Ns

• 23605.75 Ns

• 359 Ns

• 0

Answer explanation

Impulse = force x time

Tags

NGSS.HS-PS2-1

A 2.0 kg cart moving right at 5.0 m/s on a frictionless track collides and sticks to a 3.0 kg cart moving left at 3.0 m/s. What is the final speed of the carts?

• 1 m/s

• 0.2 m/s

• - 0.2 m/s

• 8 m/s

Answer explanation

Find the momentum of the two carts before the collision and that is the momentum of the two carts after the collision.

Tags

NGSS.HS-PS2-2

A firework, initially at rest, explodes into two pieces, one of which, weighing 2.0 kg, flies to the right at 15 m/s. The other piece flies to the left at 20 m/s. What is the mass of the firework before it explodes?

• 1.5 kg

• 3.5 kg

• 2.0 kg

• Unable to determine from information

Tags

NGSS.HS-PS2-2

What is the velocity of the 5kg ball after the collision?

• 6.5 m/s

• 5.5 m/s

• 2.85 m/s

• 0 m/s

Tags

NGSS.HS-PS2-2

A catcher's mitt recoils a distance of 12.9 cm in bringing a 142-gram baseball to a stop. If the applied
force is 588 N, then what was the speed of the baseball at the moment of contact with the catcher's
mitt?

• 33 m/s

• 65 m/s

• 20 m/s

• 0.5 m/s

Tags

NGSS.HS-PS2-1

Which of the following quantities is not conserved?

• momentum

• energy

• kinetic energy

• mass

Answer explanation

Kinetic energy is lost every time we apply brakes to our cars. That energy is transferred to thermal energy.

Tags

NGSS.HS-PS2-2

The impulse is _____the change in momentum

• Greater than

• Equal to

• Less than

• Always double

Tags

NGSS.HS-PS2-2

If you push an object with a force of 10 N for 5 seconds , you will change it’s momentum by:

• 2 N s

• 50 n s

• 2 N/s

• 50 N/s

Tags

NGSS.HS-PS2-1

During a collision. an object experiences an impulse. How can this impulse be calculated?

• Multiplying force by time

• Multiplying mass by velocity

• Dividing velocity by time

• Multiplying mass by acceleration

Tags

NGSS.HS-PS2-1