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 the tension in each string?

In physics, tension is described as the pulling force transmitted axially by the means of a string, a cable, chain, or similar one-dimensional continuous object, or by each end of a rod, truss member, or similar three-dimensional object; tension might also be described as the action-reaction pair of forces acting at …

## Can a rope have different tensions?

You cannot assume equal tension throughout if the pulley is not “massless” (assuming the rope does not slip over the pulley. Also, if the rope is not rigid (if it is an elastic rubber band e.g.), you will feel different tension in the rope when adding a load in one end over a pully as long as stretching happens.

## Can pure rolling happen without friction?

In rolling without slipping, friction can exist, but it does not do any work. However, friction is required to induce any changes in the angular velocity of the object. If an object is rolling along on a plane, there does not need to be any frictional force.

## Can a body roll without friction?

The force due to friction doesn’t necessarily act to oppose the motion of the body but acts to oppose slipping or sliding along the contact surface. A body can roll without slipping. Likewise, torques due to friction don’t necessarily oppose the rotation of a body (consider a wheel or pulley being driven by a belt).

## What is a Fushigi?

The Fushigi is really just a reflective metal sphere surrounded by a thick layer of crystal clear acrylic. When you hold the ball, the acrylic gives the appearance you are not making contact with the ball. But contact is essential. In fact, this art is called contact juggling. And it is an art.

## How does a magician levitate a person?

The levitation of a magician or assistant can be achieved by a concealed platform or hidden wires, or in smaller-scale illusions by standing on tiptoe in a way that conceals the foot which is touching the ground.

## What is a gravity ball?

A gravity bong, also known as a geeb, is a cannabis consumption method that uses two empty plastic bottles to funnel smoke through water and push it into the consumer’s lungs. Unscrew the lid, put your mouth over the bottle’s opening, and push the bottle down to let gravity propel the cannabis smoke into your lungs.