Hello, I’m quite unsure about the e part “calculate power required to overcome air resistance”. Don’t you also have to take into account the power needed to accelerate the car?
No you don’t have to. Have a look at the wording of the question. It says: ‘ … calculate the kinetic energy transferred to the air …’.
Hello, I’m quite confused about question(c), should total energy include energy to restart the car ? In that case , answer will be doubled: mv^2d/s
Can you explain your reasoning a bit more? I’m not sure I understand where your confusion is at the moment.
Fill in your details below or click an icon to log in:
You are commenting using your WordPress.com account. ( Log Out / Change )
You are commenting using your Twitter account. ( Log Out / Change )
You are commenting using your Facebook account. ( Log Out / Change )
You are commenting using your Google+ account. ( Log Out / Change )
Connecting to %s
Notify me of new comments via email.
Notify me of new posts via email.