Asked by Casey
A car uniformly accelerates from 0 to 27.0 m/s. A 68.0-kg passenger experiences a horizontal force of 390.0 N.
1)How much time does it take for the car to reach 27.0 m/s? (Express your answer to three significant figures.)
My teacher didn't explain how we could ever find the time it takes without having distance so I'm lost.
1)How much time does it take for the car to reach 27.0 m/s? (Express your answer to three significant figures.)
My teacher didn't explain how we could ever find the time it takes without having distance so I'm lost.
Answers
Answered by
plato
fd=1/2mv^2: 390d=0.5*68*27^2 d=68.6 68.6=27^2-0/2a a=5.31m/s^2
Answered by
bobpursley
Vf=vi+at where a= force/mass
solve for time.
solve for time.