The force on an object is given by the equation f = ma. in this equation, f is the force, m is the mass, and a is the acceleration. what is the force on an object that has a mass of 10 kg and an acceleration of 2.5 m/s2? a. 12.5 n b. 25 n c. 0.25 n d. 4 n

The answer is B. 25 Newtons.

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