Question

Consider the Uniform Circular Motion Gizmo configured as shown. Notice that, under the current settings, |a|=0.50m/s2. What changes could you make that would change the value for |a| to 2.00 m/s2?

Answer 1

To increase the centripetal acceleration to $2.00 m/s^2$, you can double the speed or decrease the radius by 1/4

Explanation:

An object is said to be in uniform circular motion when it is moving at a constant speed in a circular path.

The acceleration of an object in uniform circular motion is called centripetal acceleration, and it is given by

$a=\frac{v^2}{r}$

where

v is the speed of the object

r is the radius of the circular path

In the problem, the original centripetal acceleration is

$a=0.50 m/s^2$

We want to increase it by a factor of 4, i.e. to

$a'=2.00 m/s^2$

We notice that the centripetal acceleration is proportional to the square of the speed and inversely proportional to the radius, so we can do as follows:

- We can double the speed:

v' = 2v

This way, the new acceleration is

$a'=\frac{(2v)^2}{r}=4(\frac{v^2}{r})=4a$

so, 4 times the original acceleration

- We can decrease the radius to 1/4 of its original value:

$r'=\frac{1}{4}r$

So the new acceleration is

$a'=\frac{v^2}{(r/4)}=4(\frac{v^2}{r})=4a$

so, the acceleration has increased by a factor 4 again.

Learn more about centripetal acceleration:

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#LearnwithBrainly

Answer 2

Answer:

Either A or B would cause the desired change.

Explanation:

Gizmos explanation: Acceleration and radius are inversely proportional to one another. This means that, if you divide the radius by 4, the acceleration will be multiplied by 4. Therefore answer choice A is correct. Acceleration is proportional to the SQUARE of the speed. This means that, if you double the speed, the acceleration will be multiplied by 22, or 4. Therefore, answer choice B is also correct. So, answer choice C is the best answer - either A or B would cause the desired change in |a|.