Phys 101 help

5. Superman jumps in front of a speeding bus, puts out his arms and
stops the bus in 1 second. If the bus was traveling at 37 mph and
weighs 57000 Lb. What force did Superman apply to the bus?
Hints:
Use the "Impulse Equation" to relate the average force to the change
in momentum in a period of time.
For the mass of the bus you use W = m · g which gives m = W / g .

Superman applied a force of__________ Lb. (Note English units.)




10. Often in movies you see a person hit by a bullet being thrown
backward by the impact of the bullet. If a 69 kg person is hit by a
51 g bullet traveling at 390 m/s what would be the velocity of the
person after the bullet hits. Assume the bullet remains in the
person.
The velocity of the person+bullet is ____________ m/s.


Thanks alot for any help



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