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Can you spin faster with your arms open?
If you've ever watched an Olympic ice skater do a spin, you may have noticed that he or she will draw in her arms closer to her body in order to increase the speed of rotation. This is in keeping with the law of the conservation of angular momentum.
Why does a karate expert suddenly reduce the speed of his hand while striking a slab of ice?
Air has less viscosity than ice. To put that another way, some of the momentum of the Karatekas hand is transferred to the ice. This is what breaks the ice, if, indeed, the ice breaks. If the ice does not break, all of the momentum is transferred to the ice. This causes the hand to stop. The ice will return some of the momentum, causing the hand to reverse direction and/or break. Given an alternative, a wise martial artist will strike ice with a tool, rather than with a hand. Given a better alternative, a wise martial artist will not strike ice.
What is the momentum of a 50-kg ice skater gliding across the ice at a speed of 5 ms?
It is 250 kgm/s in the direction of the skater's motion.
How do the ice skating shoes differ from snowshoes in terms of pressure exerted?
The narrow edges to the blades of ice-skating shoes are designed to put great pressure on the ice, and help the skater to glide over the ice. Shoe-shoes are designed to spread your weight and help you to walk over deep snow without sinking in too deeply.
Why is a tornado fast?
Tornadoes owe their extremely fast winds in part to something called the conservation of angular momentum. If something that is rotation contracts in width then the spinning must speed up, such as with a spinning ice skater pulling in her arms. Tornadoes form when a larger but less intense mass of rotating air tightens and intensifies.
Can you spin faster with your arms open?
If you've ever watched an Olympic ice skater do a spin, you may have noticed that he or she will draw in her arms closer to her body in order to increase the speed of rotation. This is in keeping with the law of the conservation of angular momentum.
What do you call ice that you walk on?
Ice
Why does a karate expert suddenly reduce the speed of his hand while striking a slab of ice?
Air has less viscosity than ice. To put that another way, some of the momentum of the Karatekas hand is transferred to the ice. This is what breaks the ice, if, indeed, the ice breaks. If the ice does not break, all of the momentum is transferred to the ice. This causes the hand to stop. The ice will return some of the momentum, causing the hand to reverse direction and/or break. Given an alternative, a wise martial artist will strike ice with a tool, rather than with a hand. Given a better alternative, a wise martial artist will not strike ice.
What is the momentum of a 50-kilogram ice skater gliding across the ice at a speed of 50?
250 kg * m/s
What is the momentum of a 50 kilogram ice skater gliding across the ice at a speed of 5 m's?
500 kg·m/s
How do you determine whether it's safe to walk on ice?
Only walk on clear ice that is at least 4" thick.
Does melting an ice cube prove the conservation of matter?
Yes when it is very hot
How does math play a big role in ice skating?
The biggest role is in the effect of the pressure of the skates on the ice melting it to provide a film of water which lubricates the joint between the ice and the skates and lets them glide over the ice. Then there is the maths regarding the cooling system to ensure the ice stays as ice and doesn't become a big pool of water. Looking at the actual skating, there is the maths behind the movements. How a skater forces themselves forward; how the skater turns corners, how the skater jumps and does spins. For example, in doing a spin, there is conservation of momentum: when the skater spins with their arms outstretched they turn slowly, but when they pull their arms in they spin faster: with their arms outstretched, their moment of inertia is larger than when their arms are pulled in. As [rotational] momentum is speed of rotation times moment of inertia, if the moment of inertia reduces, the speed of rotation must increase to keep the same value (as the momentum is conserved) and hence they spin faster.
Why is it difficult to walk on ice?
Because it's slippy and you would just fall over
Do polar bears walk on warm ice?
Warm ice melts and turns into water, and no. Polar bears dont walk on water...
What is the momentum of a 50 kg ice skater gliding across the ice at a speed of 5 ms?
It is 250 kgm/s in the direction of the skater's motion.
What is the momentum of a 50-kg ice skater gliding across the ice at a speed of 5 ms?
It is 250 kgm/s in the direction of the skater's motion.
