Atme k v pontin its swing, a pe dulu n bob with a mass of 0.500 kg has a velocit

Question

Atme k v pontin its swing, a pe dulu n bob with a mass of 0.500 kg has a velocity of 223 ms. Ignoring air resistance, how high, in meters, wi will the bob swing above the fow point before reversing direction? (no units required since they are 2 Question 13: (1 point) A76 kg rock that has been dropped from a 60.0 meter high cliff experiences an average 5.5 meters. force of air resistance of 10.4 N for the last at amount of friction What is the magnitude of work done by friction as it falls 5.5 meters against th . Write the capital letter symbol for the units. No sign is required,

Explanation / Answer

Work done = F.d (dot product)

= F d cos(theta)

friction force and displacement are antiparallel. (theta = 180 deg )

F = 10.4 N and d = 5.5 m

W = 10.4 x 5.5 x cos(180)

W = - 57.2 J

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