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6 years ago

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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.
so, 1,4 are correct.

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.

piyush agrawal
class 12 student

```
6 years ago
```										answer is     1       A,C
2        D
3        B
4        A,C
5        B                                     if iam wrong then tell me ans
```
6 years ago

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