Physics-
General
Easy
Question
A wooden block with mass 2.0 kg is moving up an inclined surface (a = 30°). At point S it has a speed of 8 m/sec; the block comes to a halt at point P (see the figure which is a vertical cross-section). The friction coefficient m between the block and the inclined surface is 0.25 (assume that g = 10 m/sec2 and that the kinetic and the static friction coefficients are the same)
- Make a vector diagram showing all forces acting on the block at S, and label them properly.
- After how many seconds will the block come to a halt (at P)?
- What is the distance SP (in meters)?
- After the block reaches P, will it slide back to S or will it stay at P (give your reasons)? If it is slides back, how many seconds will it take to go from P to S?
The correct answer is: After how many seconds will the block come to a halt (at P)?
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