Krusty the Clown is testing new slapstick antics for his show and they all invol

Question

Krusty the Clown is testing new slapstick
antics for his show and they all involve
Sideshow Bob crashing into a wall as shown
below. Antic A involves Bob striking the
wall at speed v, and rebounding from it at
speed, v. Antic B involves Bob in a velcro
suit striking the wall at speed v, and
sticking to it. Antic C involves Bob striking
the wall at speed, v, crashing through
it and exiting at speed v/2. Rank the magnitude
of the impulse delivered by the wall
and rank the magnitude
of the average force that the wall exerts
on Sideshow Bob.

Explanation / Answer

impulse =mv

case 1) impulse = -m(2v)

case 2) impulse =-mv

case 3)impulse = -mv/2

hecne the magnitude of impulse is in same order as shown above

F =impulse/t

asuming t(time for collision) is same for all 3 cases..(otherwise F cant be calculated)

hence Force is also in the order shown above ie case 1 case 2 case 3

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