Momentum is defined as the total amount of motion an object has due to its mass and velocity.

• True

• False

Tags

NGSS.HS-PS2-2

Momentum is a scalar quantity.

• True

• False

Tags

NGSS.HS-PS2-2

If the momentum of an object changes, either the mass or the velocity or both changes.

• True

• False

Tags

NGSS.HS-PS2-2

When jumping from an elevated position down to the ground, you should keep your legs stiff to decrease the momentum.

• True

• False

Tags

NGSS.HS-PS2-2

When a boxer gets punched, she should move her head away from the punch to increase the contact time and reduce the force.

• True

• False

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

A dropped dish is more likely to survive a fall on carpet rather than concrete, because the softness of the carpet leads to increased contact time.

• True

• False

The impulse required to bring an object to a stop and then to “throw it back again” is less than the impulse merely to bring the object to a stop.

• True

• False

Tags

NGSS.HS-PS2-3

The law of conservation of momentum states that, in the absence of an external force, the momentum of a system remains unchanged.

• True

• False

Tags

NGSS.HS-PS2-2

Whenever objects collide in the absence of external forces, the net momentum of both objects before the collision does not equal the net momentum of both objects after the collision.

• True

• False

Tags

NGSS.HS-PS2-2

The vector sum of the momenta is the same before and after a collision.

• True

• False

Tags

NGSS.HS-PS2-2