First slide

Average Velocity

Question

The velocity of the particle 6 m/s eastwards changes to g m/s northwards in 10 s. what is the magnitude of the average acceleration during this interval of time?

Moderate

A

1.4m/s²
B

1 m/s²
C

0.2 m/s²
D

none of the above

Solution

Here $Δv = (8 j - 6 i) m / s$
$∴ | Δv | = {[(8)^{2} + (6)^{2}]}^{1 / 2} = 10 m / s$
Now $a = \frac{Δv}{Δt} = \frac{10 m / s}{10 s} = 1 m / s^{2}$

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