A bodybuilder holds a 3 kg steel ball in his hand. His arm is 70 cm long and has a mass of 4 kg. What is the magnitude of the torque on his shoulder if he a. keep arms straight parallel to the floor? b. keep arms straight but 45° down from horizontal?

answer

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explanation:

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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he kicked it 10 feet straight up into the air? i think this works.

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2