Question

the potential energy of a 16kg mass 200J and it's total mechanical energy is 400J. what is the speed of a body?​

Answer 1

Answer:

v = 5 m/s

Please acknowledge me and tell me if you've understood or not

Explanation:

Mechanical energy = Kinetic energy + Potential energy (of the system)

So put the values in the equation,

400J = 200J + KE           (K.E. is 1/2mv^2)

=> K.E. = 200J

=> 1/2mv^2 = 200J

=> 1/2 x 16 x v^2 = 200J

=> v =  $\sqrt{400/16}$

=> v = 5 m/s