Question

A particle is moving in a straight line with a constant acceleration of 2m/second square. As it passes a point A, its speed is 12m/s. What is its speed 3s after passing A?

Answer 1

To find the speed of the particle 3 seconds after passing point A, we can use the equation of motion that relates speed (v), initial speed (u), acceleration (a), and time (t):

v = u + at

Given: Acceleration (a) = 2 m/s^2 Initial speed (u) = 12 m/s Time (t) = 3 seconds

Plugging in the values:

v = 12 + (2 * 3) v = 12 + 6 v = 18 m/s

Therefore, the speed of the particle 3 seconds after passing point A is 18 m/s.