Question

how to use kinetic energy to calculate velocity

Kinetic Energy:
150,000J

Mass:
120kg

Answer 1

we are given

mass is 120kg

Energy is 150000J

$m=120kg$

$E=150000J$

now, we can use kinetic energy formula

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

where

E is energy in J

m is mass in kg

v is velocity in m/s

so, we can plug these values and find v

$150000=\frac{1}{2} (120)*v^2$

now, we can solve for v

we will get

$v=50m/s$............Answer

Answer 2

Answer:

Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

Step-by-step explanation:

the formula for kinetic energy is the integral of momentum (Force)(Speed), so when you take the integral you have to add the 1/2 to ensure that the equation is correct. In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.