Question

What is the mass of a Frisbee that is traveling at 20 m/s and has a kinetic energy of 150 J? Show your work and
use significant figures.

Answer 1

Answer:

Mass, M = 0.75kg

Explanation:

Kinetic energy can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

$K.E = \frac{1}{2}MV^{2}$

Where, K.E represents kinetic energy measured in Joules.

M represents mass measured in kilograms.

V represents velocity measured in metres per seconds square.

Given the following data;

Kinetic energy = 150J

Velocity = 20m/s

Making mass the subject formula;

$M = \frac{2K.E}{V^{2}}$

Substituting into the equation, we have;

$M = \frac{2*150}{20^{2}}$

$M = \frac{300}{400}$

Mass, M = 0.75kg