Afootball player pushes a sled on a level surface with a weight force of 760 n that acts perpendicular to the surface. the coefficient of kinetic friction between the sled and grass is 0.78 how much work does the football player perform if he pushes the sled and displaces it 10 m. assume ) the average force performed is equal to the force required to keep the sled in motion and 2) the applied force is paraîlel to the sleds displacement. (3 points) a. b. how much power did the football player produce if he performed the sled push in 3.21 seconds? (2 point)

Part a)

W = 5928 J

Part b)

P = 592.8 Watt

Explanation:

As we know that force of friction on the sled is given by

here we know that

also we know that normal force on the sled is counter balanced by the weight of the object

now we have

Now the applied force must be equal to this friction force so that it will start sliding on the grass

now if we push it by 10 m distance then work done to slide it given by

Part B)

Power required to push the sled in 10 s

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation: