Question

When traveling at top speed, a roller coaster train with a mass of12,000 kg has a velocity of 30 m/s. The kinetic energy of the train at top speed is

Answer 1

Answer: the first answer is 5,400,000 the second one is 46

Explanation: hope it helps : ]

Answer 2

Answer:

The kinetic energy of the train at top speed is 5,400,000 J

Explanation:

Kinetic Energy

It's the capacity that an object has to do work in virtue of its velocity. If we use UI units for the mass and velocity, the kinetic energy is expressed in Joules, or Nw.m or $Kg.m^2/sec^2$. It can be computed with the formula

$\displaystyle K=\frac{mv^2}{2}$

The roller coaster train has a mass of 12,000 kg and a velocity of 30 m/s. Replacing those values in the formula, we have:

$\displaystyle K=\frac{12,000\ 30^2}{2}$

$\displaystyle K=\frac{12,000\ 900}{2}$

$\displaystyle K=5,400,000\ J$