Which of the following statements are true for a moving body?
Which of the following statements are true for a moving body?
- A
If its speed changes, its velocity must change and it must have some acceleration
- B
If its velocity changes, its speed must change and it must have some acceleration
- C
If its velocity changes, its speed may or may not change, and it must have some acceleration
- D
Both $(A)$ and $(C)$
Similar Questions
Give examples of a one - dimensional motion where
$(a)$ The particle moving along positive $x- $ direction comes to rest periodically and moves forward.
$(b) $ The particle moving along positive $x-$ direction comes to rest periodically and moves backward.
$(a)$ The particle moving along positive $x- $ direction comes to rest periodically and moves forward.
$(b) $ The particle moving along positive $x-$ direction comes to rest periodically and moves backward.
In the $s-t$ equation $\left(s=10+20 t-5 t^2\right)$, match the following columns.
Colum $I$
Colum $II$
$(A)$ Distance travelled in $3\,s$
$(p)$ $-20$ units
$(B)$ Displacement in $1\,s$
$(q)$ $15$ units
$(C)$ Initial acceleration
$(r)$ $25$ units
$(D)$ Velocity at $4\,s$
$(s)$ $-10$ units
| Colum $I$ | Colum $II$ |
| $(A)$ Distance travelled in $3\,s$ | $(p)$ $-20$ units |
| $(B)$ Displacement in $1\,s$ | $(q)$ $15$ units |
| $(C)$ Initial acceleration | $(r)$ $25$ units |
| $(D)$ Velocity at $4\,s$ | $(s)$ $-10$ units |
Acceleration-time graph of a body is shown. The corresponding velocity-time graph of the same body is
Acceleration-time graph of a body is shown. The corresponding velocity-time graph of the same body is