PHYSICS 7.2 Formative

The product of a force and the time over which it acts.

• impulse

• momentum

• velocity

• acceleration

Impulse is a vector that points in the same direction as the _____

• force

• velocity

• time

• mass

You push on a 20-kg shopping cart with a force of 5.0 N. The cart moves at 2.0 m/s over a time of 2.0 s. What is the magnitude of the impulse you deliver to the cart?

• 100 kg ⋅ m/s

• 10 kg ⋅ m/s

• 40 kg ⋅ m/s

• 4.0 kg ⋅ m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

The impulse that acts on an object is always greater than the object's change in momentum.

• true

• false

Tags

NGSS.HS-PS2-2

Objects like bicycle helmets and airbags ​ (a)   the time of impact, and thereby ​ (b)   the force acting on you.

• increase
• decrease

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3