- #1
wolves5
- 52
- 0
A car with a mass of 1200 kg accelerates from rest to 20 m/s in 6.0 seconds. What average power must the car produce to cause this acceleration?
a. 5 kW
b. 15 kW
c. 30 kW
d. 40 kW
For this problem, I did (1200)(9.81) and got the force. Then I used d= (6 seconds) x ((0 +20)/2) to find the distance. I got 60 meters as my distance. I then did force times distance to get the Work. Then I divided the Work by 6 seconds because that's how you get power. I got an answer that was none of the options above. What am I doing wrong?
a. 5 kW
b. 15 kW
c. 30 kW
d. 40 kW
For this problem, I did (1200)(9.81) and got the force. Then I used d= (6 seconds) x ((0 +20)/2) to find the distance. I got 60 meters as my distance. I then did force times distance to get the Work. Then I divided the Work by 6 seconds because that's how you get power. I got an answer that was none of the options above. What am I doing wrong?