Question

18.
A car accelerates from rest at a constant rate o for some time t, after which it retards at
constant rate to come to rest. The total time taken for the trip is t. The maximum velo
reached and the total di: ance covered is
a) aß aß t 6) aß aß 4²c) 2aB 2aß d) aß 2aß 42
a+ß"a+ß
2 2 (a +ß) " a+
B a +ß" a+
B a +ß" at "​

Answer 1

Answer:

since acceleration is the slope in v-t graph..let maximum velocity be v

a=v/t1

t1=v/a...........(1)

similarly,

t2=v/b..........(2)

adding 1 and 2

t1+t2=(v/a)+(v/b)

t=v(a+b)/ab

v=abt/(a+b).

.... here a is alpha ,b is beta

t is total time =t1+t2

where t1 is time in reaching from 0 to v

and t2 is time in reaching from v to 0

hope it helped and please mark as brainliest:)