PhysicsMath Help Please
1. Determine the distance of a plane that is uniformly accelerated from 66 m/s to 88m/s in 12 seconds.
2. A plane travels 5x10^2m while being accelerated uniformly from rest at the rate of 5m/s^2. What final velocity does it attain?
3. A car moves 12m/s and goes up a hill with a uniform acceleration of -1.6m/s^2. How far has it gone after 6 seconds?
4. A truck is parked on a hill and begins to coast downhill. It accelerates from rest at a constant rate of 0.8m/s^2.
a) How fast will the truck be moving after 5s?
b) How far will the truck coast during the 5s?
Thank you very much. If you could show work, that would be great. Thanks
October 13, 2011
5 Comments • Newest first
[quote=xVolcomStone]Just sub this stuff into your equations... It's REALLY straightforward. Identify everything, and pick the right equation (I think there's 5).
Ex.
1.
V1 = 66 m/s
V2= 88 m/s
deltaT= 12 s
d= ?
So just pick the equation with all of those values in it, and solve. You're NEVER gonna learn this stuff if you don't do it yourself. I put a lot of time into learning it last year, and after a while it's super easy.
Lemme just get the values for all of them for ya.
2. A plane travels 5x10^2m while being accelerated uniformly from rest at the rate of 5m/s^2. What final velocity does it attain?
d= 5x10^2
V1= 0 m/s
A= 5 m/s^2
3. A car moves 12m/s and goes up a hill with a uniform acceleration of -1.6m/s^2. How far has it gone after 6 seconds?
V1= 12 m/s
A = -1.6 m/s^2
T = 6 s
d = ?
4. A truck is parked on a hill and begins to coast downhill. It accelerates from rest at a constant rate of 0.8m/s^2.
a) How fast will the truck be moving after 5s?
V1= 0 m/s
A = 0.8 m/s^2
T= 5 s
V2= ?
b) How far will the truck coast during the 5s?
V1= 0 m/s
A = 0.8 m/s^2
T= 5 s
d = ?
Hopefully that helps you out. I'm pretty sure you have enough info to just sub that junk in now.[/quote]
Thank you very much.
Just sub this stuff into your equations... It's REALLY straightforward. Identify everything, and pick the right equation (I think there's 5).
Ex.
1.
V1 = 66 m/s
V2= 88 m/s
deltaT= 12 s
d= ?
So just pick the equation with all of those values in it, and solve. You're NEVER gonna learn this stuff if you don't do it yourself. I put a lot of time into learning it last year, and after a while it's super easy.
Lemme just get the values for all of them for ya.
2. A plane travels 5x10^2m while being accelerated uniformly from rest at the rate of 5m/s^2. What final velocity does it attain?
d= 5x10^2
V1= 0 m/s
A= 5 m/s^2
3. A car moves 12m/s and goes up a hill with a uniform acceleration of -1.6m/s^2. How far has it gone after 6 seconds?
V1= 12 m/s
A = -1.6 m/s^2
T = 6 s
d = ?
4. A truck is parked on a hill and begins to coast downhill. It accelerates from rest at a constant rate of 0.8m/s^2.
a) How fast will the truck be moving after 5s?
V1= 0 m/s
A = 0.8 m/s^2
T= 5 s
V2= ?
b) How far will the truck coast during the 5s?
V1= 0 m/s
A = 0.8 m/s^2
T= 5 s
d = ?
Hopefully that helps you out. I'm pretty sure you have enough info to just sub that junk in now.
Last one too tough
Haha, I did these kinds of problems last week. Just use the equations of motion (wiki it), plug in the info that you have.
Looks like somebody is procrastinating