Step 1: Equate Workdone to kinetic energy Step 2: Calculate the "workdone force" from this equation. Important Note: the ""workdone force" you calculated is the "resultant force" Step 3: Equate this resultant force to the "forward force - backward force (friction force)" Hope it makes sense!
sir Q11 is tricky can u explain it to me further
Step 1: Equate Workdone to kinetic energy
Step 2: Calculate the "workdone force" from this equation.
Important Note: the ""workdone force" you calculated is the "resultant force"
Step 3: Equate this resultant force to the "forward force - backward force (friction force)"
Hope it makes sense!