0
What is the velocity of a 1000kg car if its kinetic energy is 200kJ?
Wiki User
∙ 10y ago
KE = 1/2mass * velocity squared
some conversion needed
60 kilometer per hour (1000 meters/1 kg)(1 hr/3600 seconds)
= 17 meter per second
=================
KE = 1/2(1000 kilograms)(17 m/s)2
= 1.4 X 105 Joules
------------------------
Wiki User
∙ 12y ago
Wiki User
∙ 10y agoHere is what you have to do.
* Convert all units to standard units. In this case, you must convert energy to joules.
* Copy the formula for kinetic energy.
* In this formula, replace all the information you know (in this case, the mass).
* Solve for velocity. The answer, in this case, will be in m/s.
Wiki User
∙ 15y agoIt is 20 m/s.
Wiki User
∙ 9y agoThe velocity is 29.7m/s
Wiki User
∙ 14y ago50000 Joules
Anonymous
20m/s
Add your answer:
Earn +20 pts
Put in order from smallest to biggest 10000j 100j 20j 1j 200kJ 2kJ?
1j , 2kj , 200kj , 100j , 20j , 10000,
What does efficiency have to do with work and work out?
Efficiency = (Useful Work done)/(Total Work done).This is usually expressed as a percentage.Example:For every 200KJ of energy released from coal in a power plant, only 60KJ is converted to electrical energy. Therefore, Efficiency = 60/200 =30%.
What is the efficiency of an engine when the heat input is 200000 joules and the waste heat is 150000joules?
Out of the 200KJ input, 150KJ isn't usable. The only usable output of themachine is the remaining 50KJ.The efficiency of that machine is 50KJ/200KJ = 25% .It must be pointed out, though, that it all depends on your definition of what isusable and non-usable output. For example, if this machine were labeled as an"Office Space Heater", then the 150KJ of heat would be the usable output, andthe efficiency would have been 75% .
