Question

The position of a particle x depends on time t according to the relation x = (3 m/s)t - (1 m/s^2)t^2. The speed of the particle at t = 2 s is (1) -1 m/s (2) -2 m/s (3) 2 m/s (4)1 m/s​

Answer 1

Answer:

-1m/s

Explanation:

v = dx/dt = 3-2t

For t = 2 seconds

v = 3-2×2

v = 3-4

v = -1 m/s