Asked by chyenne

a 2646lb car is moving on the freeway at 69 mph.

(a) Find the magnitude of its momentum and its kinetic energy in SI units.

(b) At what speed, in m/s, will the car's momentum be half of what it is in part (a).

(c) At what speed, in m/s, will the cats kinetic energy be half of what it is in part (a)
Answered by Ms.Black
on b), twice the mass means twice the momentum and twice the energy.

a) change 65mph to m/s. To check that, put this in your google search window:
65miles/hr in m/s
Answered by bobpursley
If you are a teacher, which I doubt, you should have failed physics in college. If you are an imposter, stop it.

chyene:
a. change to SI units, monetum=massinKg*velocityinm/s

b. halve the speed to halve the momentum.

c. reduce the speed to speed/sqrt(2)=.707 speed

Answered by Ms.Black
bobpursley, i am sorry your that way i past it and i am sorry i wrote it wrong
Answered by Ms. Sue
Ms.Black -- do you mean?

"Bobpursley, I am sorry you're that way. I passed it and I am sorry I wrote it wrong."

Answered by Ms.Black
I am a teacher i am a 2nd grade if has been 19 years since i have done this level physics


Answered by Ms. Sue
You should provide a better English model for your students. Heaven help them if they don't know to capitalize I and that you're means you are. You apparently are not teaching them to begin sentences with capital letters and end them with periods.

Answered by Ms.Black
I am a math teacher.
Answered by Writeacher
For 2nd grade? Please!!

It doesn't really matter what grade or subject you teach, if you can't write better in English than that, you have no business in a classroom.
Answered by Ms. Sue
Amen!
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