Block 1 (10 kg) is pulled by a rope from left to right up a ramp which is inclined 50 degrees from the horizontal. The rope pulls on block 1 with a force of 150 N parallel to the surface of the inclined plane. The coefficient of kinetic friction between the block and the surface equals 0.3. Weight force on block 1 by Earth W1E =  i +  j N Tension force on block 1 by Rope T1R =  i +  j N Normal force on block 1 by Surface N1S =  i +  j N Frictional force on block 1 by Surface f1S =  i +  j N What is the acceleration a of block 1? a =  i +  j m/s2

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.