- #1
- 877
- 1
Lets say you have a box at the bottom of a frictionless ramp and you give it a velocity (X) of let's say 10 m/s, so that when it gets on the ramp, the components velocities would be:
Vx = 10 * cos (angle)
Vy = 10 * sin (angle)
then once it gets ontp the ramp, the gravitational acceleration changes from
being -9.81 m/s^2 down (Y) to a combination of X and Y acceleration.
I am trying to find the X and Y acceleration, I have been looking at the diagram of the ramp and box and have drawn my force lines to indicate which direction everything has a force exserted on it, but when I goto calculate the acceleration I get very confused.
So let's just say in this example the ramp is at an angle of 50 degrees, the box has in initial X velocity (before the ramp) of 10 m/s and we will esimate gravitational acceleration at -10 m/s^2.
so we now have the box on the ramp with:
Vx = 10 * cos (60) = 5 m/s
Vy = 10 * sin (60) = 8.7 m/s
acceleration X = ? -10 * sin (60) = -8.7 m/s^2 ?
acceleration Y = ? -10 * cos (60) = -5 m/s^2 ?
is that right? or is it:
acceleration Y = ? -10 * sin (60) = -8.7 m/s^2 ?
acceleration X = ? -10 * cos (60) = -5 m/s^2 ?
Vx = 10 * cos (angle)
Vy = 10 * sin (angle)
then once it gets ontp the ramp, the gravitational acceleration changes from
being -9.81 m/s^2 down (Y) to a combination of X and Y acceleration.
I am trying to find the X and Y acceleration, I have been looking at the diagram of the ramp and box and have drawn my force lines to indicate which direction everything has a force exserted on it, but when I goto calculate the acceleration I get very confused.
So let's just say in this example the ramp is at an angle of 50 degrees, the box has in initial X velocity (before the ramp) of 10 m/s and we will esimate gravitational acceleration at -10 m/s^2.
so we now have the box on the ramp with:
Vx = 10 * cos (60) = 5 m/s
Vy = 10 * sin (60) = 8.7 m/s
acceleration X = ? -10 * sin (60) = -8.7 m/s^2 ?
acceleration Y = ? -10 * cos (60) = -5 m/s^2 ?
is that right? or is it:
acceleration Y = ? -10 * sin (60) = -8.7 m/s^2 ?
acceleration X = ? -10 * cos (60) = -5 m/s^2 ?