Question

IM.L1.4-01 A common practical joke is to pull a seat out from under someone as they attempt to sit down. The person falls to the floor and nobody has fun. Assume this happens to a 65 kg person, they fall 0.48 m, and it takes the floor 0.078 s to bring them to rest. (a) What was the impulse exerted on the person by the floor? (b) What was the average force exerted on the person by the floor? (c) Use the Proportionality sense-making analysis to check if your answer to part (b) behaves the way you'd expect. If the time the floor spends bringing the person to rest decreases, does your average force increase or decrease? Should this shorter time interval effect the impulse?

Answer 1

al Impulse ='mlv-u) = 65+ (Wagh) - 6S ($2x9.8x0.48) $199.37 N-s Tang & Infulse 199.37 (3) 0.078 ( =>(2556-04N If time taken by floorto bring a person to rest is decreased, the average force increases. It is so because , F is inversely proportional to time 't'.

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