what effect does the lenght of the radius of a circle have on the speed ofanobjectmovingarounditscircumference

Question

sorry that some of it is not spaced

Answer 1

Okay, I answered three of these questions, now do your own homework. Or at least post them in "Homework Help" category.

Answer 2

You're going to have to give a little bit more of an explaination on why you're asking?

Are we talking about space ships? Planets? In orbit, planets travel faster in perigee around the sun (when closer) than in apogee (when farther) from the sun. However this is for an ellipitical orbit. As Keppler determined the area swept out by moving planets in a given time is constant.

In a perfect circle, theoretically per Keppler, the speed will remain unchanged at any point in the circle.

Now speed and velocity are different. Speed is constant, but since velocity is a vector, moving in a circle will cause a change in velocity. A change in velocity results in acceleration and thus a generation of force. The smaller the circle, the faster the change in direction, thus a greater acceleration and results in a greater force. A larger circle has the opposite results.

But you'll have to go into greater detail if you want a better answer...

Answer 3

Well, the shorter the radius the slower the object moves to maintain revolutions per minute and the longer the radius the faster it must go.
For example aircraft propellers have a problem of the tip speed exceeding the speed of sound if the radius is long and the rpm is high. So, if the aircraft designer wants to use a high powered engine they have to shorten the prop so the tip will not exceed the speed of sound or use a geared propeller to keep the speed down.
If you put taller tires (longer radius) on your car, then you will go faster than your speedometer will show. Your odometer will also be incorrect as well since you will have traveled a longer distance per revolution. The odometer counts the revolutions and knows the original distance traveled per revolution.
If the speed remains the same and the radius is increased, the object will appear to slow down because it takes longer to make a revolution. If the radius is decreased the object will appear to go faster, such as an ice skater spinning on the ice.

Answer 4

No effect at all.