# Question: Is Centripetal Force Always Positive?

## Is the centripetal force constant?

2: The radial (centripetal) force is constant (like a satellite rotating about the earth under the influence of a constant force of gravity).

The circular motion adjusts its radius in response to changes in speed.

This means that the radius of the circular path is variable, unlike the case of uniform circular motion..

## Does normal force equal centripetal force?

Only the normal force has a horizontal component, and so this must equal the centripetal force—that is, Nsinθ=mv2r ⁡ θ = m v 2 r .

## What is the relationship between centripetal force and mass?

Note that the conditions here assume no additional forces, like a horizontal circle on a frictionless surface. For a vertical circle, the speed and tension must vary.

## Is centripetal acceleration positive or negative?

As to why the sign of centripetal acceleration is negative, this is because we denote it to be in the radial direction. The radial direction is the direction that starts at the center of a circle and goes directly outwards. Since the centripetal acceleration points inwards, we give it a negative sign.

## Why is centripetal force equal to weight?

There is no reason for the centripetal force to be greater or less than the weight of the ball. It is the tension in the string which must be greater than the weight of the ball.

## What is centripetal force give example?

A force acting on a moving body at an angle to the direction of motion, tending to make the body follow a circular or curved path. The force of gravity acting on a satellite in orbit is an example of a centripetal force; the friction of the tires of a car making a turn similarly provides centripetal force on the car.