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Newtonian mechanics covers the discussion of the movement of classical bodies under the influence of forces by making use of Newton’s three laws. For more general discussion of energy, momentum conservation etc., use classical-mechanics, for Newton’s description of gravity, use newtonian-gravity.

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When the person starts moving, the boat will start moving backward due to reaction. backward momentum = forward momentum. So, when the person stops, the process will reverse so that center of mass of …
answered Feb 8 '16 by kpv
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The force applied on second box is by contact. Therefore in order to constantly apply the force on second box, first box has to move to stay in contact. Half of the force is used up in accelerating th …
answered Mar 31 '16 by kpv
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If the net hitting force passes through the center of mass of the object being hit, it will have linear movement, otherwise, it will have some rotation as well as movement.
answered Feb 13 '16 by kpv
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In general the answer is yes. But depending upon initial relative positions and masses, they will start accelerating towards the common center of mass. In this process, some of them will collide, and …
answered Jul 5 by kpv
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The floating mechanism that keeps 100000 kg (including plane, load, and pilot), plane afloat, will at the time of release, keep working now on 99000 kg. That means the 99000 kg will feel a 1000 kg upw …
answered Mar 22 '16 by kpv
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The ball will not move until the wall of the shell touches it. A freely hanging bell is a very common test for it. you push the shell of the bell and the metal ball inside does not move till the wall …
answered Feb 8 '16 by kpv
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Ignoring friction, final speed at the bottom will be same for both because they loose same potential energy (assuming same mass). Therefore, acceleration down the flatter path will be less, and it wil …
answered Feb 13 '16 by kpv
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It is so obvious - due to your balance. You can see, it is more likely to loose balance and fall forward with the bad form. The combined center of gravity seems beyond (in front) of your feet. In …
answered Feb 19 '16 by kpv
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In #2 and in #3, You are calculating Vf as average velocity, not final velocity. With constant acceleration, your final velocity is twice the average so, it is 5 m/s, not 2.5 m/s. Now you will get all …
answered Sep 5 '17 by kpv
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Simply go by your car's specifications, which is normally somewhere between 50 and 60 miles an hour for optimal mileage per gallon. If your car has, use the cruise control. Unless you press too hard o …
answered Mar 22 '16 by kpv
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Due to its weight, the ladder presses on both sides which causes friction on both sides. As the ladder moves, the angle changes and with the changing angle, the pressure (force) it exerts on two sides …
answered Feb 20 '16 by kpv
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The movement comes from push, or pull. A push, or pull comes from one of the forces. For example, a push happens when two things/fields can not co-exist at same point of space time and one (or both) o …
answered Apr 17 '16 by kpv
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Hold it in the center, make it vertical and either throw it, or give yourself some spin and just release it. If you hold it in the center and keep it horizontal, it will be like a spear, but if you h …
answered Jul 18 '16 by kpv
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I am giving the solutions of original task (to get the speed at point B). I am not sure if the questions are necessary to perform the task. If you are sure the path taken does not matter (and I will …
answered Feb 7 '16 by kpv
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No. If that was possible, then the device boosts speed which in turn increases friction and so more boost and so on, soon your car is flying without fuel. Any energy generated this way would come from …
answered Jan 13 '18 by kpv

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