Table of Contents
Why do things rise when spinning?
The faster the ball moves, the more it wants to go off in that direction. As it slows down gravity will over come the centrifugal force, pulling it downwards. It’s not so much a matter of “the faster it spins the higher it goes” as “the additional force necessary to make it go faster also makes it go higher”.
Why do less dense things rise?
Hot air pushes out on the air around it, and thus becomes less dense. Less dense air rises because the denser, cooler air sinks because it is heavier and gravity pulls on it more strongly.
Do dense things rise?
The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
Do denser items sink?
Key Concepts. Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.
Why do TOPS stay upright?
In order for a top to fall over its angular momentum needs to go from pointing vertically (either up or down, depending on which direction it’s spinning) to pointing sideways. So, in a cheating nutshell, tops stay upright because falling over violates angular momentum.
Why do tops not fall over?
When it is spinning its angular momentum is quite high. By conservation of angular momentum the spinning top is then more stable against small torques like the action of gravity on the top.
Why do objects rise in water?
When you submerge an object in some fluid, then the fluid beneath the object will have higher pressure than the fluid above the object. This causes a net force on the object acting upwards.
Why does warm water rise?
When you heat up water, the water molecules start moving around faster and faster. So hot water is less dense than cold water. When you put the two together with the hot water on the bottom, the hot water rises to the top, mixing with the cold water along the way and creating purple water.
Why do objects float in water?
An object floats when the weight force on the object is balanced by the upward push of the water on the object. The upwards push of the water increases with the volume of the object that is under water; it is not affected by the depth of the water or the amount of water.