A body is dropped from a height of 30m. What is the velocity of the body after it has covered a distance of 20 m? (Given g= 10 m/s 2) please fast

approximately 19.8  m/s

If using g = 10 m/s^2, the answer rounds to 20 m/s

Explanation:

You can use the kinematic formula that relates distance covered, velocities and acceleration (without time dependence) given by:

which in our case becomes:

If using g = 10 m/s^2, the answer is 20 m/s

the answer is b, have negligible mass