Question

A roller coaster has 800,000 Joules of kinetic energy and is moving with a speed of 40m's What is the mass of the roller coaster ing?As boe in the number for your answer, not the unitsThe formula for kinetic energy isThe formula for potential energy isvelocidorspeed inms8 - 10m this really 9.8 m son earth but we will use 10 for simplicity

Answer 1

Given:

The kinetic energy of roller coaster is K=800000 J.

The speed of roller coaster is v=40 m/s.

The formula for kinetic energy is given as,

`K=(1)/(2)mv^2`

Substitute the known values in the formula,

`\begin{gathered} 800000\text{ J=}(1)/(2)m(40m/s)^2 \\ m=\frac{2(800000\text{ J)}}{(40m/s)^2}(\frac{1kgm^2s^(-2)^{}}{1\text{ J}})_{} \\ =1000\text{ kg} \end{gathered}`

Thus, the mass of roller coaster is 1000 kg.