Friends...Help me to solve this question..!!!
Answers
hy
friend
x here is your answer x
→weighting = 1000kg
→ mass → 1000kg (force exerted by 1000kg) mass
u → 36km/hr
→ 36x 5/18
→ 10 m/ s
v →72km/ hr
→ 72x 5/18
→ 20 m/s
t →2min
→2x 60
→ 120 secs.
××we know that××
w = F x s
F = mxa
a = v-u/ t
= (20-10)/120= 1/12 m/ s^2.
v^2- u^2= 2as
(v-u) (v+u)=2x (v-u)x s/ t
s = 1/2(v+u) x t = 1/2 (20+10)x 120
=1800m
w = m x a x s
= 1000 x 1x 1800/12
= 1.5 x10^5 J
Power = work done/ t
= 1.5 x 10^ 5/120
= 1.25 x 10^3 watts.
× thankyou
× brainly user