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Results tagged with newtonian-mechanics
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user 35591
Newtonian mechanics discusses the movement of classical bodies under the influence of forces by applying Newton’s three laws. For more general concepts, use [classical-mechanics]. For Newton’s description of gravity, use [newtonian-gravity].
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Moving a bar magnet towards a freely hanging coil
"A bar magnet is moved towards a freely hanging coil. Determine if the coil stays stationary or not. If it moves, determine if it moves away or towards the magnet."
My hypothesis: From Lenz's law an …
- 553
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Period of pendulum in falling lift
A simple pendulum suspended from the ceiling of a stationary lift has period $T_0$. When the lift descends at steady speed, the period is $T_1$. When the lift descends with constant downward accelerat …
- 553
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Asymmetry of induced e.m.f due to a bar magnet falling through a coil
It is well known that as a bar magnet falls freely through a coil, an electromotive force is induced in the coil by Lenz's Law.
However, it appears that the peak e.m.f induced (ignoring the direction …
- 553
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Extension of an unfixed spring
Suppose a spring with spring constant 1 N m^-1 is held horizontally. If a pull of 1 N is applied to its left end and a pull of 2 N is applied to its right end, how much longer would the spring be as c …
- 553
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Effects of firing shells on the Earth's angular momentum
During a certain war, millions of shells were fired by country A towards the west, and even more shells were fired back by country B towards the east. The average momentum of each bullet were the same …
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Work done in pulling a rope from a boat
A boy sitting on a boat pulls on a rope with a constant force $F$ over a duration of time $t$. The other end of the rope is either tied to a bridge or to another freely floating boat of equal mass. …
- 553
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Where does energy in a field come from?
Let us consider an example of energy in the Earth's gravitational field.
If we put a ball somewhere in this field, the ball starts to accelerate due to the gravitational force exerted upon it.
Gra …
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