Quiz on Impulse

The equation for impulse is_______

• I=Ft

• I=mF

• I=mRT

• I= mT

What is the SI unit of impulse?

• N/m2

• N·s

• N/m

• kg·m

Change in momentum of an object is equal to the_______

• Enthalpy

• Entropy

• Impulse

• Internal Energy

When contact time is shorter, the force of impact is:

• cannot be determined

• Smaller

• Bigger

• Same

What is true about impulse and momentum?

• Momentum and impulse are unrelated to each other.

• Momentum is the mass of the substance multiplied by the velocity while impulse is a change in momentum.

• Impulse is a mass times velocity while momentum is force times time.

• Impulse deals with velocity while momentum deals with change in velocity.

A moderate force will break an egg. However, an egg dropped on the road usually breaks, while one dropped on the grass usually doesn’t break. This is because for the egg dropped on the grass:

• The time interval for stopping is less.

• The time interval for stopping is greater.

• The change in momentum is less.

• The change in momentum is greater.

Impulse is what kind of quantity?

• Time

• Scalar

• Force

• Vector

If the halfback experienced a force of 800 N for 0.9 seconds to the North, determine the impulse.

• 0 N·s

• 720 N·s

• 3.0 N·s

• 1.5 N·s

A lady tennis player hits an approaching ball with a force of 750 N If she hits the ball in 0.002 s, how much impulse is imparted to the tennis ball?

• 10.0 N·s

• 720 N·s

• 3.5 N·s

• 1.5 N·s

The following are safety devices installed on vehicles to ensure the safety of the passengers EXCEPT:

• side mirror

• air bag

• seat belt

• music box