Johnny Jolly runs into Robert Ferguson while they are practicing football and Jo

Question

Johnny Jolly runs into Robert Ferguson while they are practicing football and Johnny’s mass is 124 kg, while Robert’s is 105.5 kg. Just before the collision occurs, Johnny’s velocity is 5 m/s and Robert’s is 6.5 m/s in the opposite direction. During the collision, Johnny exerts an average force of 1950N against Robert. a. What is the momentum of each player prior to the collision? b. How large is the average force Robert exerts against Johnny during the collision? (Hint: Review Newton’s Laws) a. If this is the only horizontal force acting on each player, what average acceleration does each player experience during the collision? b. If this is an inelastic collision, what is the final velocity of each player after the collision? (include direction of each player)
Johnny Jolly runs into Robert Ferguson while they are practicing football and Johnny’s mass is 124 kg, while Robert’s is 105.5 kg. Just before the collision occurs, Johnny’s velocity is 5 m/s and Robert’s is 6.5 m/s in the opposite direction. During the collision, Johnny exerts an average force of 1950N against Robert. a. What is the momentum of each player prior to the collision? b. How large is the average force Robert exerts against Johnny during the collision? (Hint: Review Newton’s Laws) a. If this is the only horizontal force acting on each player, what average acceleration does each player experience during the collision? b. If this is an inelastic collision, what is the final velocity of each player after the collision? (include direction of each player)
Johnny Jolly runs into Robert Ferguson while they are practicing football and Johnny’s mass is 124 kg, while Robert’s is 105.5 kg. Just before the collision occurs, Johnny’s velocity is 5 m/s and Robert’s is 6.5 m/s in the opposite direction. During the collision, Johnny exerts an average force of 1950N against Robert. a. What is the momentum of each player prior to the collision? b. How large is the average force Robert exerts against Johnny during the collision? (Hint: Review Newton’s Laws) a. If this is the only horizontal force acting on each player, what average acceleration does each player experience during the collision? b. If this is an inelastic collision, what is the final velocity of each player after the collision? (include direction of each player)

Explanation / Answer

Mj= 124kg , Mr= 105.5kg , Uj= 5m/s , Ur= 6.5m/s

Pj = MjUj= 124× 5= 620kgm/s

Pr= MrUr= 105.5× 6.5= 685.75kgm/s

B) according to Newton third law to every action there is equal and opposite reaction

So F= 1950N

C) a = F/Mj= 1950/ 124= 15.7m/s^2

a'= F/Mr= 1950/105.5=18.48m/s^2

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