The coefficient of static friction [itex]μ_s[/itex] between the 100kg block and wedge is [itex]0.20[/itex]. Determine the magnitude of force [itex]P[/itex] required to raise the block if the rollers are frictionless and wedge massless. You may take [itex]g=9.8m/s^2[/itex]
The Attempt at a Solution
The block will move whenever there is relative motion between block and wedge.
For impending motion,
That will give:
Plugging in the values,
Only that my teacher thinks that the answer is wrong. According to him, P should be 465N and N1 should be 1073N odd. Though he didn't elaborate, he thinks that something is wrong with my resolution of P. I don't understand how and I also don't understand why the normal is greater than the weight of the block.