1. The problem statement, all variables and given/known data
Peter, a 100 kg basketball player, lands on his feet after completing a slam dunk and then immediately jumps up again to celebrate his basket. When his feet first touch the floor after the dunk, his velocity is 5 m/s downward; when his feet leave the floor 0.50 s later, as he jumps back up, his velocity is 4 m/s upward.
a) What is the average net force exerted on Peter during this 0.50 s?
b) What is the average reaction force exerted upward by the floor on Peter during this 0.50 s?
c) What is the impulse exerted on Peter during this 0.50 s?
2. Relevant equations
a) Fave = mass *(Vf - Vi) / time ?
b) Fgrf = mass *(Vf - Vi) / t + mg ?
c) no idea
3. The attempt at a solution
a) 100 (4-5) / 0.5 = -200kg
b) 100 (4-5) / 0.5 + 100 * 9.81 = 1181 N
c) HELP ME!!!
Am I on the right track? Please help! Many many thanks in advance
1. The problem statement, all variables and given/known data
2. Relevant equations
3. The attempt at a solution
Peter, a 100 kg basketball player, lands on his feet after completing a slam dunk and then immediately jumps up again to celebrate his basket. When his feet first touch the floor after the dunk, his velocity is 5 m/s downward; when his feet leave the floor 0.50 s later, as he jumps back up, his velocity is 4 m/s upward.
a) What is the average net force exerted on Peter during this 0.50 s?
b) What is the average reaction force exerted upward by the floor on Peter during this 0.50 s?
c) What is the impulse exerted on Peter during this 0.50 s?
2. Relevant equations
a) Fave = mass *(Vf - Vi) / time ?
b) Fgrf = mass *(Vf - Vi) / t + mg ?
c) no idea
3. The attempt at a solution
a) 100 (4-5) / 0.5 = -200kg
b) 100 (4-5) / 0.5 + 100 * 9.81 = 1181 N
c) HELP ME!!!
Am I on the right track? Please help! Many many thanks in advance
1. The problem statement, all variables and given/known data
2. Relevant equations
3. The attempt at a solution
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