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1
vote
Projectile motion launched at an angle and landing higher than start
For projectiles, the equations of motion can be separated into the horizontal and vertical motions:
$$x(t) = V_x*t$$
$$y(t) = V_y*t-\frac 12*g*t^2$$
If this figure is reasonable for the problem, then …
0
votes
Accepted
Free Form Diagram of one block on top of another block
Now in Block B, why does N1 considered act downwards?
N1 is determined from the free body diagram (FBD) of block A. The direction is arbitrary, but it makes sense if N1 is pointed up on block A t …