Question

The acceleration of a particle moving along a straight line is a=-0.2m/s where v is in m/s. If its initial velocity v=80m/S determine its velocity when t=2s, which equation should you start?

Answer 1

To determine the velocity of the particle when t = 2s, we can use the equation of motion for constant acceleration:

v = u + at

Where: v = final velocity u = initial velocity a = acceleration t = time

In this case, the given acceleration is a = -0.2 m/s (negative because it is in the opposite direction to the initial velocity), and the initial velocity is u = 80 m/s. We want to find the velocity when t = 2s. Plugging in the values into the equation, we get:

v = 80 m/s + (-0.2 m/s) * 2 s

Simplifying the equation:

v = 80 m/s - 0.4 m/s v = 79.6 m/s

Therefore, when t = 2s, the velocity of the particle is 79.6 m/s.