Answer:
6698.03 J
Explanation:
Kinetic Energy: This is a form of mechanical energy that is due to a body in motion. The S.I unit of Kinetic Energy is Joules (J).
The formula for kinetic energy is given as
Ek = 1/2mv².......................... Equation 1
Where Ek = kinetic Energy, m = mass of the object, v = velocity of the object.
Given: m = 49.9 pounds, v = 54.4 miles per hours.
Firstly, we convert pounds to kilogram.
If 1 pounds = 0.454 kg,
Then, 49.9 pounds = (0.454×49.9) kg = 22.655 kg.
Secondly, we convert miles per hours to meters per seconds.
If 1 miles per hours = 0.447 meter per seconds,
Then, 54.4 miles per hours = (0.447×54.4) = 24.3168 meters per seconds.
Substitute the value of m and v into equation 1
Ek = 1/2(22.655)(24.3168)²
Ek = 6698.03 J.
Thus the Kinetic energy of the object = 6698.03 J
