Answer:
Both
Kinetic energy is 25 joule
Potential energy is 784.8 joule
Step-by-step explanation:
Given : A 2-kg bowling ball rolls at a speed of 5 m/s on the roof of the building that is 40 tall.
To find : Is it KE or GPE or Both
Solution :
Mass of the ball - 2 kg
Velocity of the ball - 5 m/s
Height - 40 tall
Both the energy is applied on the object.
1) Kinetic energy (KE)
Formula to find KE is [tex]KE=\frac{1}{2}mv^2[/tex]
[tex]KE=\frac{1}{2}(2)(5)^2[/tex]
[tex]KE=25[/tex]
Kinetic energy is 25 joule.
2) Potential energy (GPE)
Formula to find GPE is [tex]PE=mgh[/tex]
g is the acceleration due to gravity, [tex]g=9.81 m/s^2[/tex]
[tex]PE=(2)(9.81)(40)[/tex]
[tex]PE=784.8[/tex]
Potential energy is 784.8 joule.
