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 uniformly accelerated motion:

v = u + at

where: v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time.

Given that the acceleration (a) is -0.2 m/s² and the initial velocity (u) is 80 m/s, we can plug these values into the equation:

v = 80 + (-0.2) * 2

Simplifying the equation:

v = 80 - 0.4

v = 79.6 m/s

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