Identical twins Bo and Joe have the same mass and arc running at the same speed

Question

Identical twins Bo and Joe have the same mass and arc running at the same speed towards a brick wall. Bo slides on the ground and friction gradually brings him to a stop. Joe runs into the wall and the wall force brings him to a sudden and painful stop. Who had the greater initial momentum? (alpha) Bo (beta) Joc (gamma) same Who had the greater final momentum? (alpha) Bo (beta)Joc (gamma)same Who had the greater change tn momentum? (alpha) Bo (beta)Joc (gamma)same Who was acted on by the greater impulse?(alpha) Bo (beta)Joc (gamma)same Who took more time to stop? (alpha) Bo (beta)Joc (gamma)same Who was actcd on by a greater stopping force?(alpha) Bo (beta)Joc (gamma)same Arc your answers to (d),(c) and (f) consistent? (alpha)yes (beta)no (gamma)Huh?

Explanation / Answer

a) same (gamma) ; as their iintial mass and speed are the same. b) Joe (beta) ; as joe continues to run with the same speed where as bo speed decreases gradually. c) Joe ( beta) ;He came to sudden stop so his momentum changes from maximum value to zero in a very short time hence there is a great change in his momentum d) Joe (beta); because Impulse is nothing but change in momentum . and hence impulse is more on Joe e) Bo (alpha) ; it can be easily understood from the question it self . f) Joe (beta) ; Because wall exerts a greater force on him and brings him in a sudden stop. g) Yes (alpha)

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