# What forces act on a ball on a string?

There are two forces acting on the ball: tension from the string and force due to gravitation. They cancel each other.

## What keeps a ball on the string moving on a circular motion?

A centripetal force is a net force that acts on an object to keep it moving along a circular path.

## What is the tension in the string when the ball is at the top?

1. A ball of mass M attached to a string of length L moves in a circle in a vertical plane as shown above. At the top of the circular path, the tension in the string is twice the weight of the ball.

## What is the law of inertia in physics?

1. Newton’s First Law of Motion (Inertia) An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.

## Why is tension highest at the bottom?

Tension and gravity are NOT “in the same direction”. The tension in the rope is always directed toward the middle of the circle. At the bottom, that means tension is UPWARD while gravitational force is directed DOWNWARD. The two are in opposite directions, not the same direction.

## Why does increasing tension increase wave speed?

Tension determines the vertical force (perpendicular to wave motion) on molecules of string and hence determines the speed of perpendicular motion. Faster the perpendicular motion, faster the wave has passed by.

## What will happen to the ball tied to a string and whirled in a horizontal circle if the string breaks?

This is Expert Verified Answer When that (string) force is removed, the object will move in a straight line with whatever velocity it happened to have when the force was removed. So when the string breaks, the ball will move in a straight line.

## What is the ball’s centripetal acceleration?

Centripetal Acceleration Formula. The centripetal (‘center-seeking’) acceleration is the motion inwards towards the center of a circle. The acceleration is equal to the square of the velocity, divided by the radius of the circular path. ac = v2/r. ac = acceleration, centripetal, m/s2.

## How do you find acceleration in physics?

Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction.

## What makes the ball keep on rolling?

This is Expert Verified Answer As we know the inertia allows the ball to keep rolling. Friction act on ball and ground that allow the ball to roll.

## What causes centripetal force?

Centripetal forces cause centripetal accelerations. In the special case of the Earth’s circular motion around the Sun – or any satellite’s circular motion around any celestial body – the centripetal force causing the motion is the result of the gravitational attraction between them.

## How does centripetal force work?

The unit of centripetal force is newton. The centripetal force is always directed perpendicular to the direction of the object’s displacement. Using Newton’s second law of motion, it is found that the centripetal force of an object moving in a circular path always acts towards the centre of the circle.

## Where is the string most likely to break when the ball is at the top or bottom of the circle?

tension is greatest at the bottom of the circular path. This is where the rope is most likely to break.

## What is tension in string in vertical circle?

Tension in the string, T = 10 kg wt. = 10 × 9.8 N. = 98 N. Tension in a vertical circle is maximum at lowest point. Tmax = m v2 ⁄ r + m g.

## What are the 3 laws of inertia?

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

## What’s Newton’s 4th law?

These laws can be paraphrased as follows: A body remains at rest, or in motion at a constant speed in a straight line, unless acted upon by a force. When a body is acted upon by a force, the time rate of change of its momentum equals the force.

## What are the 3 laws of motion called?

What Are Newton’s Three Laws of Motion? The Newton’s three laws of motion are Law of Inertia, Law of Mass and Acceleration, and the Third Law of Motion. A body at rest persists in its state of rest, and a body in motion remains in constant motion along a straight line unless acted upon by an external force.

## How do you find the tension in a swinging rope?

We can think of a tension in a given rope as T = (m × g) + (m × a), where “g” is the acceleration due to gravity of any objects the rope is supporting and “a” is any other acceleration on any objects the rope is supporting.

## What is circular motion formula?

The instantaneous acceleration in a uniform circular motion is given by. a = v2/R. v is the velocity of the object. R is the radius of the circle. The direction is perpendicular to velocity and directed inwards along the radius.

## Is tension a centripetal force?

Tension is the centripetal force (keeps motion in a circular path).

## What is tension in circular motion?

Formula for tension in a vertical circular motion. When the object is at the bottom the centrifugal is acting in the direction of the gravitational force. The formula of tension will be = centripetal force + force of gravity = mv2/r + mg = m(v2/r+g)