Question

Please help!!

Answer 1

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 $KE=\frac{1}{2}mv^2$

$KE=\frac{1}{2}(2)(5)^2$

$KE=25$

Kinetic energy is 25 joule.

2) Potential energy (GPE)

Formula to find GPE is $PE=mgh$

g is the acceleration due to gravity, $g=9.81 m/s^2$

$PE=(2)(9.81)(40)$

$PE=784.8$

Potential energy is 784.8 joule.