Q1: Draw
a free body diagrm for both masses, label all forces.
Q2: Assuming
the +xhat axis is up the incline, write an equation that shows
the sum of all forces in the x direction. For example, SFx
and the sum of all forces in the y direction, SFy
for M1.
Q3:
Do the same thing for M2, assume that yhat
is vertical.
Q4: Look
at the equation you derived for question #2 above. How many forces
are you assuming in the x direction? How many in the y direction?
Can we ignore any of these forces? If so, which ones and why.
Looking at problem #2, there are three forces in the x direction
and two forces in the y direction. The forces in the y direction
are equal and opposite thus cancelling each other, therefore they
do not effect the block's acceleration and can be ignored.
Q5: What
is the acceleration of the system? What would it mean if your acceleration
were negative?
The acceleration is positive so the crate is moving
up the incline. If the acceleration had been negitive the crate
would be moving down the incline.
Q6: What
is the tension of the rope?
Q7: Let
us assume that the ramp is 10 meters long (and that the crate slides
the entire 10 meters). What is the speed of the crate when it gets
to the top of the ramp?
Since the crate is accelerating up the
10 meter ramp, we can easily find the final velocity at the top
of the ramp.
Q8: If
our enterprising physics student stops the crate in 1.5 seconds,
then how much force does she apply to the crate?
