1 answer

Football Coach

Question:

A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes. The friction force on the sled is 1020N and the angle between the two ropes is 21.0^circ. How hard must each player pull to drag the coach at a steady 2.10 {rm m/s}?

Answers

Friction force F = 1020 NAngle between the two ropes θ = 21 degreesAngle between central line and rope φ = θ /2=10.5 degreesThe sled moves with constant speed.So, applied force of two players in central line ( Horizontal line) is equal to frictional force.Let the force applied byeach player be F 'F ' cos φ +F ' cos φ = F2F ' cos φ = FF ' = F / ( 2 cos φ )= 518.68 N.

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