# What centripetal force does a 22 kg child need to stay on an amusement park merry-go-round that rotates at 3.00rev Min if she is 8.00 m from its center?

So the centripetal force that the child will have to apply in order to stay on the ride is mass times centripetal acceleration, and centripetal acceleration is the radius multiplied by the angular velocity squared. So we have 22 kilograms times 1.25 meters, times 4.1888 radians per second squared, giving 483 newtons.

## What is the problem of merry-go-round?

The merry-go-round is spinning. Therefore, it is a rotational motion problem.

## What is merry-go-round in physics?

The motion of a merry go round is circular motion. In this motion the merry go round exerts a centripetal force on the person riding it. The more we move away from the center of circular motion the more centripetal force will be applied on the person riding it.

## What type of motion is in merry go round?

A merry go round completes its revolution in a fixed interval of time. This is an example of periodic motion. Also the merry go round moves in a circular path.

## What is the moment of inertia of the merry go round?

The moment of inertia of the merry-go-round (about an axis through its center) is 500 kg·m2. A child of mass 25 kg, originally standing at the rim, walks in to the exact center. The child can be considered as a point mass.

## What mechanism is in action in a merry go round?

A force is required for an object to move in a circle, as is the case with a merry-go-round. This force is called a centripetal force.

## Does a merry go round accelerate?

Yes, the merry-go-round is accelerating. Even if the merry-go-round is going around in a circle at constant angular speed, the linear speed constantly changes direction.

## Why does a merry go round stop spinning?

When a person jump on a rotating merry go round, its angular velocity increases as he or she moves close to the center. Finally, it stops due friction.

## Does a merry-go-round have torque?

So there is an external force acting on the merry go round/child system. However, this pivot force acts through the system’s centre of mass, so there is no external torque on the merry go round/child system.

## What is the formula for the moment of inertia of the merry-go-round disk rotating in a circle?

The total moment of inertia is the sum of the moments of inertia of the merry-go-round and the child (about the same axis): I=(28.13kg⋅m2)+(56.25kg⋅m2)=84.38kg⋅m2. Substituting known values into the equation for α gives α=τI=375.0N⋅m84.38kg⋅m2=4.44rad/s.

## What is the angular acceleration of the merry-go-round?

A merry-go-round rotates from rest with an angular acceleration of 1.50 rad/s2 .

## Why is sitting on a merry go round which is moving with a constant speed of 10 Metre per second this means that the boy is?

A boy is sitting in a merry-go-around that is moving at a constant speed of \[10m/s\]. The merry-go-round moves in a circular way. Therefore, the boy is moving in a circular motion.

## What is the 4 types of motion?

• linear.
• rotary.
• reciprocating.
• oscillating.

## What are the 3 types of motion?

According to the nature of the movement, motion is classified into three types as follows: Linear Motion. Rotary Motion. Oscillatory Motion.

## What is Moi physics?

moment of inertia, in physics, quantitative measure of the rotational inertia of a body—i.e., the opposition that the body exhibits to having its speed of rotation about an axis altered by the application of a torque (turning force).

## What is the moment of inertia of a point mass?

For a point mass, the moment of inertia is just the mass times the square of perpendicular distance to the rotation axis, I = mr2. That point mass relationship becomes the basis for all other moments of inertia since any object can be built up from a collection of point masses.

## Is angular momentum equal to linear momentum?

The magnitude of the angular momentum of an orbiting object is equal to its linear momentum (product of its mass m and linear velocity v) times the perpendicular distance r from the centre of rotation to a line drawn in the direction of its instantaneous motion and passing through the object’s centre of gravity, or …

## Is a merry-go-round a rotation or revolution?

The merry-go-round makes one complete revolution every two seconds (demo). makes one complete revolution every two seconds. rotating about a fixed axis is the same.

## Does a merry-go-round revolve or rotate?

A rotation has the axis (center) of the motion inside the object, a revolution has the axis (center) of the motion outside the object. A child on a merry-go-round revolves, since the axis is outside the child.

## Why is it called a merry-go-round?

The first records of merry-go-round come from around 1720. The name most likely comes from the fact that riders “go (a)round” in circles and are hopefully merry while they do so. Merry-go-rounds are common attractions at amusement parks. The ride is gentle and is usually safe even for younger children.

## What happens to the acceleration during the same time period?

If the change in velocity increases, what happens to the acceleration during the same time period? Acceleration increases.

## How do you find friction in circular motion?

The centripetal force causing the car to turn in a circular path is due to friction between the tires and the road. A minimum coefficient of friction is needed, or the car will move in a larger-radius curve and leave the roadway. We know that Fc=mv2r. Thus Fc=mv2r=(900.0kg)(25.00m/s)2(500.0m)=1125N.

## Which way does the acceleration point for an object traveling in a circle?

Acceleration is in the direction of the change in velocity, which points directly toward the center of rotation—the center of the circular path.

## What provides centripetal force on a merry go round?

The observer on the ground sees that the person on the Merry go round is moving in a circle and that the force that pulls the rider to the center of that circle is the friction from the floor of the Merry go round; which is known as centripetal force.