Question

A stone of mass 2.0 kg is dropped from a rest position 5.0m above the ground. What is its
velocity at a heigh of 3.0m above the ground?
A) 16.0 m/s
B) 12.5 m/s
C) 6.3 m/s
D) 9.3 m/s​

Answer 1

Answer:

C

Explanation:

$E=m*g*h=1/2*m*v^2$

${v} =\sqrt\frac{2*m*g*h}{m} = \sqrt\frac{2*2kg*9.8\frac{m}{s^2} *2m}{2kg} = 6.26$