Momentum and Impulse

The momentum of an object is defined as the object's

• mass times its velocity.
• force times the time interval.
• force times its acceleration.
• mass times it acceleration.

Which has more momentum, a large truck moving at 30 miles per hour or a small truck moving at 30 miles per hour?

• Both have the same momentum
• The small truck
• The large truck
• IDK

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Compared to a sports car moving at 30 miles per hour, the same sports car moving at 60 miles per hour has

• twice as much momentum.

• four times as much momentum.

• the same momentum.

• three times as much momentum

If the momentum of an object changes and its mass remains constant,

• it is accelerating (or decelerating).
• there is a force acting on it.
• its velocity is changing.
• all of the above

The momentum change of an object is equal to the

• impulse acting on it.
• velocity change of the object.
• force acting on it.
• force acting on it times its velocity.

In order to increase the final momentum of a golf ball, we could

• increase the force acting on it.
• follow through when hitting the ball.
• increase the time of contact with the ball.
• all of the above

The reason padded dashboards are used in cars is that they

• look nice and feel good.
• decrease the impulse in a collision.
• increase the force of impact in a collision.
• increases the time of impact in a collision

Tags

NGSS.HS-PS2-3

A table tennis ball launcher is fired. Compared to the force on the ball, the force on the launcher is

• larger.
• the same.
• smaller.

A table tennis ball launcher is fired. Compared to the impulse on the ball, the impulse on the launcher is

• smaller.
• larger.
• the same.

Momentum of a system is conserved only when

• there are no internal forces acting on the system.
• the system is not moving.
• there are no forces acting on the system.
• there is no net external force acting on the system.