Question

A body of mass 60 kg is pushed up
with just enough force to start if
moving on a rough surface with
Ils
0.5 and uk
= 0.4 and the force
continues to act afterwards. What is
the acceleration of the body
(A) 19.6 m/s2
(B) 27.8 m/s?
2
(C) 2 m/s
(D) 0.98 m/s2​

Answer 1

Answer:

I think (D)

dear

not sure

Answer 2

Answer:

mass = 60

force required to start moving = 600 x 0.5 = 300N

force required to keep it moving = 600 x 0.4 = 240N

force which accelerated = 300-240 = 60N

A = F/M = 60/60 = 1m/s2 = 0.98 m/s2 (as gravity is 9.8 not 10)

Explanation: