- #1
steve357
- 13
- 0
I have 2 doubts regarding work and KE
first deltaKE=work done which = force * disp * cos theta..if theta lies between 90 and 180 then work done is negative so change in KE is -ve so even final KE can come negative..but we know that KE can never be negative..where am i wrong??Second- how do we find the work done when a variable force changing even its direction at times..acts on a body?
first deltaKE=work done which = force * disp * cos theta..if theta lies between 90 and 180 then work done is negative so change in KE is -ve so even final KE can come negative..but we know that KE can never be negative..where am i wrong??Second- how do we find the work done when a variable force changing even its direction at times..acts on a body?