Afootball player at practice pushes a 60 kg blocking sled across the field at a constant speed. the coefficient of kinetic friction between the grass and the sled is 0.30.

how much force must he apply to the sled?

a. 18 n

b. 60 n

c. 180 n

d. 600 n

C. 180 N

Explanation:

= mass of the blocking sled = 60 kg

= Coefficient of kinetic friction = 0.30

= kinetic frictional force acting on the sled

kinetic frictional force acting on the sled is given as

=Force applied

For the sled to move at constant speed, the applied force must be same as the frictional force

momentum of soft ball three times less than baskey ball