Impulse and Momentum

A truck with a mass of m_t collides inelastically with a car with a mass of m_c. The velocity of the truck is v, and the car is at rest. In terms of the given quantities, what

is the final momentum of the system?

• m_tv/(m_t+m_c)

• m_tv+m_cv

• m_cv

• m_tv

Tags

NGSS.HS-PS2-2

An object with a weight of 19.6 N moves with a constant velocity of 20.0 m/s. A net force of 6.00 N is applied to the object in the direction of its motion for 4.00 seconds.

What is the final momentum of the object?

• 16 kg*m/s

• 24 kg*m/s

• 64 kg*m/s

• 80 kg*m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

During an egg toss, a catcher must cushion the egg by maximizing the time it takes to stop the egg. Find the impulse applied to a 60.0-gram egg, if the egg has an initial velocity of 6.0 m/s as it first touches the catcher’s hand, and the egg is stopped within 50.0 cm.

• 0.36 N•s

• - 0.36 N•s

• 0.010 N•s

• - 0.010 N•s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

NGSS.HS-PS2-3

A wooden ball with a mass of 0.45 kg is at rest when it is tapped by a wooden mallet that applies an average force of 83 N to the ball. After contact with the mallet, the ball moves forward at 1.3 m/s. How long was the mallet in contact with the ball?

• 7.0 milliseconds

• 3.7 milliseconds

• 2.4 milliseconds

• .59 milliseconds

Tags

NGSS.HS-PS2-1

A 50.0 kg child is riding in a 120.0 kg bumper car at an amusement park. The child drives the bumper car at 4.5 m/s head-on into the wall of the ride and rebounds at 1/3 the speed. What is the magnitude of the change in momentum of the child in the bumper car?

• 375 kg m/s

• 510 kg m/s

• 720 kg m/s

• 1020 kg m/s

Tags

NGSS.HS-PS2-2