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45 femtometers to two significant figures

A falling object will reach terminal velocity when the force draging it down (ie its weight due to gravity) is equal to the air resistance opposing the motion upwards. When the two forces are equal the ob...

step 1: find objects weight by doing 9.81x10= 98kg (2s.f.)step 2: draw a triangle of forces about the object including all information you know e.g. 45 degree angle step 3: force down the slope use the eq...

My first thought when dealing with resultant forces is to try out the most common combinations: combined and opposite. In this case 10N + 4N = 14N and 10N - 4N = 6N. This tactic does rule out two of the a...

When a wave reaches the end of a string, it is reflected and inverted, so in a fixed string in which we've caused vibrations, such as a guitar string, we have two sinusoidal waves travelling in opposite d...