- #1
jaumzaum
- 434
- 33
In every single question asking about the maximum height you get from jumping in 2 different planets they consider that the speed you leave the ground is constant. Why is that?
Speed would be constant if impulse were constant. Impulse would be constant if both force and time were constants. But I cannot explain why this would be true. Force exerted on ground is equal to the normal force (third Newton Law), and the normal force is equal to the weight + net force that will actually produce an acceleration. The first one is dependent on gravity. Also, it is not that clear why my jump movement (moving my bones and joints) would take the same time in 2 different planets.
Speed would be constant if impulse were constant. Impulse would be constant if both force and time were constants. But I cannot explain why this would be true. Force exerted on ground is equal to the normal force (third Newton Law), and the normal force is equal to the weight + net force that will actually produce an acceleration. The first one is dependent on gravity. Also, it is not that clear why my jump movement (moving my bones and joints) would take the same time in 2 different planets.