What do you mean by work? Give an example of negative work done? What is the work to be done to increase the velocity from 18 km/hr to 19 km/hr if the mass of the care is 2000 kg.
Answers
Answered by
6
dot product of force and displacement is known as work.
work done is negative when a force acts opposite to the direction of motion of the body.
w= change in kinetic energy
ke initial= 1/2×2000×18×19=324000j
ke final=1/2×2000×19×19=361000j
w=361000-324000
w=37000j
work done is negative when a force acts opposite to the direction of motion of the body.
w= change in kinetic energy
ke initial= 1/2×2000×18×19=324000j
ke final=1/2×2000×19×19=361000j
w=361000-324000
w=37000j
Similar questions