The final kinetic energy of the skateboarder after she freewheels and did work against friction on the flat section of the path is 4,600 J.
The final kinetic energy of the stakeboarder is determined by applying the principle of conservation of energy as shown below;
ΔK.E = -W
K.Ef - K.Ei = -W
where;
K.Ef = K.Ei - W
K.Ef = 5,000 J - 400 J
K.Ef = 4,600 J
Thus, the final kinetic energy of the skateboarder is 4,600 J.
Learn more about kinetic energy here: brainly.com/question/25959744
Answer:
Yes. A 200 kg bucket of cement = About 440.925 pounds of cements.
Explanation:
5.09 Pa
Area of the circle = πr²
The diameter is given, so 100/2 = 50 m is the radius.
π x 50² = 7854 m²
Pressure = force/area
Pressure = 40000/7854
Pressure = 5.09 Pa
Hope this helps!
