Timeline for Why does a reaction force still allow the thing exerting the force to move?
Current License: CC BY-SA 3.0
9 events
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| May 1, 2015 at 18:04 | comment | added | 8Mad0Manc8 | Yes i think your getting into further issues like impulses, inertia and friction. Friction is dependent upon the vertical force of gravity and the constant component of friction between the two that is dependent on the objects that are in contact. For the case you have described you should ignore friction and inertia | |
| May 1, 2015 at 17:46 | comment | added | WORLD 1 | Not necessarily, Sir. Assume that the hand was to push the box with $10N$. The box would then move forward (assuming the force was enough to overcome friction). However, the hand should then stop exerting any force and become stationary instead of moving with the box... | |
| May 1, 2015 at 17:35 | comment | added | 8Mad0Manc8 | I must admit newtons third law states equal and opposite thus if a 45N force is exerted in one direction the same must be exerted in the other but if this was the case every force would result in no change in an objects acceleration. | |
| May 1, 2015 at 17:08 | comment | added | 8Mad0Manc8 | If the hand and the box are accelerating at the same amount and in the same direction the relative velocity between the two is zero ie they are travelling at the same velocity in the same direction at any instant in time thus the relative velocity between them is zero. Iam still thinking about your question though. | |
| May 1, 2015 at 17:03 | comment | added | WORLD 1 | Could you please explain how the relative velocity between the hand and the boxes remains $0$? Thanks a lot in advance! | |
| May 1, 2015 at 16:46 | comment | added | 8Mad0Manc8 | I Think yes the hand does experience a force of 45N in the opposite direction meaning the relative velocity of the hand and the boxes remains zero. But the hand has to accellerate along with the boxes in order to maintain the zero relative velocity between them. | |
| May 1, 2015 at 16:33 | history | edited | 8Mad0Manc8 | CC BY-SA 3.0 |
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| May 1, 2015 at 16:29 | comment | added | WORLD 1 | But why should the hand be able to keep on moving in contact with the blocks? Shouldn't Newton's Third Law prevent it from doing so? | |
| May 1, 2015 at 16:22 | history | answered | 8Mad0Manc8 | CC BY-SA 3.0 |