To give a 16 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 35° 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.

Question

anonymous · Answer

I am not completely sure of how to get the exact solution, but I think these steps should help you find it

i. Draw a force diagram
ii. Break the angled pulling force vector into its x and y component
iii. Add the forces
iv. Convert the x and y components into one vector
v. Solve for F = ma

|dw:1346655810511:dw|

I think weight, mg might need to be included too