To give a 17 kg child a ride, two teenagers pull on a 3.4 kg sled with ropes, as

Question

To give a 17 kg child a ride, two teenagers pull on a 3.4 kg sled with ropes, as indicated in the figure. Both teenagers pull with a force of F = 45 N at an angle of 35degree relative to the forward direction, which is the direction of motion. In addition, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find the acceleration of the sled and child. 1.6 Your response differs from the correct answer by more than 10%. Double check your calculations. m/s^2

Explanation / Answer

2Fcos(35) - 57 = ma

a = 0.81m/s^2

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