2. 302
During a football workout, two linemen are pushing the coach on the sled. The combined mass of
the sled and the coach is 300. kg. The coefficient of friction between the sled and the grass is 0.800.
The sled accelerates at a rate of 0.580 m/s/s. Determine the force applied to the sled by the lineman.

When someone eats food

Initial velocity,  u = 4.9 m/sfinal velocity = v m/sinitial height,  h₁ =  245 m    final height, h₂ = 0a = -9.8  m/s²time taken = t secondss = ut + 0.5at²⇒  (h₂-h₁) = ut + 0.5at²⇒  0-245 = 4.9t + 0.5×(-9.8)×t²⇒ -245 = 4.9t - 4.9t²⇒ 4.9t² -4.9t -245 =0solving it, we get   t = 7.59sv  = u +  at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/svelocity is  69.48 m/s downward

45 is the correct answer