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a. x=mt2+c
v=dx/dt=2mt
a=dv/dt=2m=const.
so, 1,4 are correct.
b. x=mt+c
v=dx/dt=m=const.
a=dv/dt=o
so, 3,5 are correct.
c. v2=mx+c
or, v=(mx+c)1/2
a=dv/dt={m(mx+c)-1/2/2}(dx/dt)={m(mx+c)-1/2/2}v=m/2=constant.
d. v=mx+c
a=dv/dt=mdx/dt=mv=m(mx+c)
so, 2,4 are correct.
to understand the above method, you must have knowledge of deifferntiation and straight line eqn.
for more, you may ask---
piyush agrawal
class 12 student
answer is 1 A,C
2 D
3 B
4 A,C
5 B if iam wrong then tell me ans
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