Kinetic Energy in Joules of an Object

[jpartdq]

Homework Statement

A car is traveling at a constant 60 miles per hour. What is its kinetic energy in Joules if its mass is 800 kg?

Homework Equations

KE = 1/2m * v2 (?)

The Attempt at a Solution

½(800kg)*(26.82 m/s)2 = 287,724 kg * m2/s2 = 287,724 J

I hope that looks right. I'm a business major and my advisor suggested this Physics class as "easy" for business majors. So far its not going so well. LOL Any help someone can offer on my solution would be great. Thanks.

 

[hage567]

Looks OK to me.

 

[tomcue]

Your solution is correct! The formula you used is the correct equation for calculating kinetic energy, where m is the mass of the object and v is its velocity. In this case, the mass of the car is 800 kg and its velocity is 60 miles per hour, which is equivalent to 26.82 meters per second. Plugging these values into the equation gives us a kinetic energy of 287,724 Joules.

It's great that you are taking a physics class as a business major! Physics is a fundamental science that can help you understand and analyze various real-world situations, including those in business. Keep up the good work!