A child pulls a wagon by the handle along a flat sidewalk. She exerts a force of 80.0 N at an angle of 30.0 above the horizontal while she moves the wagon 12 m forward. The force of friction on the wagon is 34 N.

Question

Calculate the mechanical work done by the child on the wagon

Calculate the total work done on the wagon

Answer 1

asd

Answer 2

Force/F= 80N
Angle=30 degrees
Distance/deltad=12m
Friction Force/Ff=34N

(a) W = Fcos(30)d
W = (80N)(cos30)(12m)
W = 831.38J

Answer 3

W = 831.38J
Ff = 34N
deltad = 12m

(b) W + (Ff x 12m)
= W + (-34N x 12m)
= 831.38J + (-408)
= 831.38J - 408
= 423.38J