Answer:
The mass of a rolling ball with kinetic energy of 18 joules and velocity of 3m/s is 4kg.
Explanation:
HOW TO CALCULATE MASS?
The mass of a moving object can be calculated by using the following expression:
K.E = ½ mv²
Where;
K.E = kinetic energy (Joules)
m = mass (kg)
v = velocity (m/s)
According to this question, rolling ball has 18 joules of kinetic energy and is rolling at 3m/s. The mass is calculated as follows:
18 = ½ × m × 3²
18 = ½ × 9m
36 = 9m
m = 4kg
Therefore, the mass of a rolling ball with kinetic energy of 18 joules and velocity of 3m/s is 4kg.
