Question

1 point

Answer 1

Given that,

Mass of object, m = 55 kg

Mechanical energy of the object, M = 4306 J    

Potential energy, P = 2940 J

We know that the mechanical energy is the sum of kinetic and potential energy such that,

Mechanical energy = kinetic energy + potential energy

$K=M-P\\\\K=4306-2940\\\\K=1366\ J$

Kinetic energy is given by :

$K=\dfrac{1}{2}mv^2$v is velocity of object

$v=\sqrt{\dfrac{2K}{m}} \\\\v=\sqrt{\dfrac{2\times 1366}{55}} \\\\v=7.04\ m/s$

So, the velocity of object is 7.04 m/s.