Question

A particle moves

along the X-axis according to the equation (t) = 2.0 - 4.0r m.

What are the velocity and acceleration at t= 2.0 s and t= 5.0 s?

Answer 1

The equation of motion of a particle is given by

$$x(t)=2.0-4.0t$$

The velocity

$$v(t)=x'(t)=-4.0\:\rm m/s$$

The acceleration

$$a(t)=v'(t)=0\:\rm m/s^2$$