To find the time when only acceleration and velocity are given, you can use the kinematic equation that relates displacement, velocity, acceleration, and time. The equation is:
v = u + at
Where: v is the final velocity u is the initial velocity a is the acceleration t is the time
If you know the initial velocity (u), acceleration (a), and final velocity (v), you can rearrange the equation to solve for time (t):
t = (v - u) / a
Simply substitute the given values for velocity (v) and acceleration (a) into the equation, and you can calculate the time (t) it takes for the body to reach that velocity under the given acceleration.