Question

The variation of speed (in m/s) of an object with time (in seconds) is given by the expression $V(t) = V_0 - 5t + 5t^2$

• A. At time $t = 0$ s, the instantaneous acceleration is zero
• B. At time $t = 0$ s, there is a deceleration of the object
• C. At time $t = 1$ s, the object is at rest
• D. At time $t = 1$ s, the instantaneous acceleration is zero
• E. The distance travelled by the object at time $t = 1$ s is $V_0$ m

Hint:

If the acceleration function $a(t)$ has a negative value at a given time, the object is decelerating at that moment.

Answer 1

The Correct Option is B