Physics

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Multiple choice.

The airbag in a car works in a collision by . . .
a. increasing the time of the impact to the person.
b. reducing the impulse to the person.
c. reducing the momentum of the person.
d. increasing the force on the person.


A cannonball shot from a cannon with a long barrel will have a greater muzzle velocity because the cannonball receives a greater . . .
a. force.
b. impulse.
c. both force and impulse.
d. neither force nor impulse.
.

  • Physics -

    How much kinetic energy does a 1 kg ball have if it has a velocity of 10 m/s?
    a. 100 J.
    b. 50 J.
    c. 10 J.
    d. 5 J.

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