Answer:
The kinetic energy of a 45 gram golf ball traveling at 20 m/s is 9 Joules
.
Explanation:
Given:
Mass of the golf ball= 45 gram
velocity at which the golf ball travels=20m/s
To Find:
Kinetic energy=?
Solution:
We define kinetic energy as the energy gained by a body by virtue of its motion or from its state of rest to its motion.It’s unit is Joules.
[tex]\text{kinetic energy} = \frac{1}{2} mass\times velocity^2[/tex]
Mass= 45 grams
Converting into kg
1000 grams = 1 kilogram.
45grams= 0.045kg
Also velocity given as 20 m/s
Hence substituting the values
Kinetic Energy= [tex]\frac{1}{2} \times0.045\times (20)^2[/tex]
Kinetic Energy=9 Joules
.
