Question

s=2t2 -6t2, then velocity at 3 seconds will be？​

Answer 1

Answer:

velocity = -24 m/s

Explanation:

Given,

Displacement as a function of time.

S = 2t² - 6t²

To find: velocity at t = 3 sec

Solution:

We can get the answer by simply differentiating the displacement with respect to time which gives us a general equation for any time 't' for velocity.

S = 2t² - 6t²

velocity = dS / dt = 4t - 12t = -8t

at, t = 3 sec

velocity = -8t = -8*3 = -24 m/s