Answer:
Kinetic energy = 90.98 J
Explanation:
Given that,
The mass of a hammer, m = 2.2 kg
At a distance of 4.50 m above the ground, the hammer's total mechanical energy is 188 J.
We need to find the kinetic energy of the hammer at this height.
We know that,
Mechanical energy = kinetic energy + potential energy
[tex]188=K_E+mgh\\\\K_E=188-mgh\\\\K_E=188-2.2\times 9.8\times 4.5\\\\K_E=90.98\ J[/tex]
So, the kinetic energy of the hammer at this height is equal to 90.98 J.
