Question

An object is moving along x axis such that its displacement is given by x = 20 t2 (t raised to 2).Find velocity when t =2s

Answer 1

We know that by differentiating Displacement, we get velocity.

Therefore, we need to find dx/dt to get the equation for velocity.

#RITZ

Answer 2

Solution:—

As we know,

dx/dt = v

here,

x= 20t²

d 20t²/dt

=20(2)t²-¹

= 40 t

t= 2s (given)

40×2

= 80 m/s