AP EAPCET 25-Aug-2021 Shift 2 Paper

Given, weight of body, W=64N
Coefficient of static friction, µs=0.8
Coefficient of dynamic friction, µd=0.6
Force required to move the body from rest
= Coefficient of static friction × Weight of the body
=µs×mg
=0.8×64 ...(i)
Force required to overcome dynamic friction
= Coefficient of dynamic friction × Weight of thebody
=µd×mg
=0.6×64 ...(Ii)
As weight, W=64N
∴ Mass of the body, m=

64

g

As we know, F=ma
From Eqs. (i) and (ii), we get
F=mg(µs−µd)
ma=64(0.8−0.6)
⇒

64

9

×a=64(0.2)
⇒ a=0.2g