How much work must be done to stop a body of 1000kg travellihg at 100km/h?
Asked by
| 28th Apr, 2009,
03:01: PM
Expert Answer:
Find the kinetic energy of the body moving at this speed. The work that must be done is equal to the change in kinetic energy of the body.
K = 1/2mv^2. Put m =100kg.
Change in speed given in km/h to m/s by multiplying by 5/18 ( obtained by simplifying 1000/3600).
The final velocity of the body is zero as it has to be stopped, so final kinetic energy = 0.
Use
Work done = change in kinetic energy
Answered by
| 5th May, 2009,
10:50: AM
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Sign Up
Verify mobile number
Enter the OTP sent to your number
Change