Question

the velocity starts from rest , acceleration at 2 m/ s square for 10s and then goes for constant speed for 30 s and then decelerates at 4m/s square till it stops. .what is the distance traveled by it
a) 750
b)800
c)700
d)850

Answer 1

answer: a

reason:
velocity accquired by body is 10 s
v=0+2×10=20m/s
and distance traveled by it is 10 s
S1 =1/2×2×(10) square= 100m

then it moves with constant velocity (20 m/s) for 30 s

S2= 20×30= 600m

after that due to retardation 4m/s square it stops
S3= v square/2a= (20) square/2×4 = 50 m
.

total distance= S1+S2+S3 =
750 m



# be brainly

Answer 2

Hey user

Your answer is in the attachment.

Refer it

Thank you