Question

If a particle is moving along a straight line and its velocity varies with time as $v \,=\, 2t - t^2$, (v and t are in SI units) then choose the incorrect option.

• A. Average velocity from $t\, =\, 0$ to $t\, =\, \frac {5}{2}$ s is $\frac {5}{12} m/s$
• B. Acceleration is zero at t = 1 s
• C. Acceleration is $2 \,m/s^2$ at t = 0
• D. Average speed from t = 0 to t = 2 s is $\frac {4}{3} m/s$

Answer 1

Answer: (D)

Correct answer is (d) Average speed from t = 0 to t = 2 s is $\frac {4}{3} m/s$