Kinetic Energy in Joules of an Object

Click For Summary
The kinetic energy of a car traveling at 60 miles per hour with a mass of 800 kg is calculated using the formula KE = 1/2 m * v². Converting the speed to meters per second gives approximately 26.82 m/s. The calculation results in a kinetic energy of 287,724 Joules. The poster expresses difficulty with the physics course, which was recommended as an easy option for business majors. Assistance and validation of the solution are requested.
jpartdq
Messages
8
Reaction score
0

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.
 
Physics news on Phys.org
Looks OK to me.
 

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?
View full post »

Similar threads

Kinetic energy in electron volts
  • · Replies 7 ·
Replies
7
Views
6K
Ranking Kinetic Energy: Why Does Mass Matter More Than Amplitude?
  • · Replies 22 ·
Replies
22
Views
4K
How much kinetic energy to propel an object
  • · Replies 1 ·
Replies
1
Views
1K
Momentum & Kinetic Energy: Solve for Force
  • · Replies 8 ·
Replies
8
Views
2K
Conservation of momentum or kinetic energy?
  • · Replies 5 ·
Replies
5
Views
2K
What is the maximum attainable speed for the car?
  • · Replies 4 ·
Replies
4
Views
2K
Kinetic/Potential Energy - What am I doing wrong?
  • · Replies 7 ·
Replies
7
Views
1K
Kinetic energy & Conservation of energy
  • · Replies 17 ·
Replies
17
Views
2K
Block-pulley system and kinetic energy
  • · Replies 1 ·
Replies
1
Views
3K
Kinetic energy lost during a collision?
  • · Replies 3 ·
Replies
3
Views
4K