Table of Contents

## How do you calculate the force needed to lift an object?

If the object is lifted straight up at constant speed, then the force needed to lift it is equal to its weight mg. The work done on the mass is then W = Fd = mgh.

**How far from the fulcrum does the 60 lb weight need to be to balance the lever?**

The 60 pound load rests 2 feet from the fulcrum, producing a counter-clockwise torque of 120 foot – pounds around the pivot point.

**How is mechanical advantage calculated?**

To determine its mechanical advantage you’ll divide the length of the sloped side by the width of the wedge. For example, if the slope is 3 centimeters and the width is 1.5 centimeters, then the mechanical advantage is 2, or 3 centimeters divided by 1.5 centimeters.

### How do you calculate effort force?

In a class one lever the force of the effort (Fe) multiplied by the distance of the effort from the fulcrum (de) is equal to the force of the resistance (Fr) multiplied by the distance of the resistance from the fulcrum (dr).

**How much force is required to lift a 100g mass?**

To lift a body of 100 g we need to apply a force of about 1 N.

**How much force is needed to lift the 10Kg weight?**

How much force is needed to lift the 10Kg weight? The correct answer is (B) 5 Kg. In a double-pulley system, the force is equal to the weight divided by two. It will require a 5 Kg force to lift a 10Kg weight.

## How much weight is required to balance the lever?

How much weight is required to balance the lever Asvab? It will require a 5 Kg force to lift a 10Kg weight.

**What is mechanical advantage Grade 8?**

Mechanical Advantage A ratio of what is produced by a machine (output) to what is put into the machine (input).

**What does a mechanical advantage of 1 mean?**

Mechanical Advantage = 1. A machine with a mechanical advantage of 1 means that a machine changes the direction of the force.

### What is the formula of effort distance?

The effort distance (also sometimes called the “effort arm”) is shorter than the resistance distance. Mechanical advantage = |Fr/Fe | where | means “absolute value.” Mechanical advantage is always positive.

**What is the formula for ideal effort force?**

In general, the IMA = the resistance force, Fr, divided by the effort force, Fe. IMA also equals the distance over which the effort is applied, de, divided by the distance the load travels, dr. Refer back to the discussions of each simple machine for the specific equations for the IMA for each type of machine.

**How much weight can be lifted with 25lbs of effort?**

Change output direction, change force, and changes speed. Given a second class lever with a distance of 5 feet from the fulcrum to the effort and a distance of 33 inches from the resistance to the fulcrum, what is the maximum amount of weight that can be lifted with 25lbs of effort?

## How much force is applied to a 1 foot diameter wheel?

A force of 50 lbs is applied to a 1-foot diameter wheel. The wheel is turning a .25″ diameter axle. How much mechanical advantage does the wheel provide? If friction is included in a simple machine, the amount of effort required to move a load will be _____________ what is calculated using the formulas for simple machines.

**How is mechanical advantage expressed in block and tackle?**

In a block and tackle one end of the rope is attached to a fixed mounting point, which can be on the anchor or the load and another is pulled to lift the load. If the end of the line is attached to the load, the mechanical advantage will be expressed as an odd number, for example, 3:1.

**What’s the maximum load reduction for a pulley?**

The pulley load reduction is equal to the reciprocal of the mechanical advantage. The maximum practical load reduction is 1/4 because few systems have more than four ropes.