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.
2 answers
fd=1/2mv^2: 390d=0.5*68*27^2 d=68.6 68.6=27^2-0/2a a=5.31m/s^2
Vf=vi+at where a= force/mass
solve for time.
solve for time.
0 answers