Physics, asked by aryalic2007p261zb, 1 year ago

A girl having a mass of 35kg sits on a trolley of mass 5kg. The trolley is given an initial velocity of 4ms^-1 by applying a force. The trolley comes to rest after travelling a distance of 16m . how much work is done on the trolley?

Answers

Answered by akhilsatish
9
Mass of girl = 35 kg
Mass of trolley = 5 kg
Total mass = 35+5=40 kg
u=4 m/s
v=0
s=16 m 
v^2=u^2+2 a s
0 = (4)^2 + 2 a(16)
32 a = -16
 a = -0.5 m/s^2
Force exerted, F= ma = 40* 0.5 = 20N
(a)work on trolley, W =F*S (20 N)(16 m)=  320 J
(b)work by girl , W=F*S
    (mass of girl)*retardation*S
    = 35*0.5*16
    = 280 J


Similar questions