# How Does a Salad Spinner Utilize Centripetal Force?

• soccerjayl
In summary, there is a clever kitchen gadget for drying lettuce leaves that consists of a cylindrical container with small holes and a hand crank. When rotated at 1.8 revolutions per second, the magnitude of centripetal acceleration at the outer wall is 3.07 m/s^2. However, this solution is incorrect and the correct calculation involves converting the period to frequency.
soccerjayl
The question is: There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a hand crank. The outer wall of the cylinder is perforated with small holes. You put the wet leaves in the container and turn the crank to spin off the water. The radius of the container is 14 cm. When the cylinder is rotating at 1.8 revolutions per second, what is the magnitude of the centripetal acceleration at the outer wall?

My answer is 3.07 m/s^2, however it is wrong.

What i did: A(c)=(4pi^2 x 0.14 m)/1.8 sec

(1.8 sec)(A(c))=5.527

A(c)=3.07 m/s^2

What did I do wrong?

sorry..i figured it out:

just for anyone's curiosity, the solution:

Had to convert period to frequency, or 1.8 to 1/1.8 (5/9).

A(c)=(4pi^2 x 0.14 m)/(5/9)^2

(25/81)A(c)=5.53

A(c)=17.9 m/s^2

Your calculation for the centripetal acceleration is correct, however it is missing the unit of time in the final answer. The unit for centripetal acceleration is meters per second squared (m/s^2), which means the final answer should be 3.07 m/s^2. So, your calculation is correct, but you just forgot to include the unit in the final answer.

## 1. What is centripetal motion?

Centripetal motion is the movement of an object in a circular path around a fixed point. It is caused by a centripetal force that acts towards the center of the circle, constantly changing the direction of the object's velocity.

## 2. What is the difference between centripetal force and centrifugal force?

Centripetal force is the force that keeps an object moving in a circular path, while centrifugal force is the apparent outward force experienced by an object in circular motion. Centrifugal force is in fact just the result of inertia, and it does not exist as a physical force.

## 3. How is centripetal force calculated?

Centripetal force can be calculated by using the formula F = mv^2/r, where F is the centripetal force, m is the mass of the object, v is the velocity, and r is the radius of the circular path.

## 4. What are some real-life examples of centripetal motion?

Some examples of centripetal motion include a car moving around a curve, a satellite orbiting the Earth, a ferris wheel, and a spinning top.

## 5. How is centripetal motion related to Newton's laws of motion?

Centripetal motion is related to Newton's laws of motion, specifically the first and second laws. The first law states that an object in motion will remain in motion unless acted upon by an external force, which in the case of centripetal motion is the centripetal force. The second law states that the force acting on an object is equal to its mass times its acceleration, which can be seen in the equation for centripetal force.

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