# How do you calculate work done when lifting weights?

As you are lifting the object you are doing work on the object. The work W done on an object by a constant force is defined as W = F·d. It is equal to the magnitude of the force, multiplied by the distance the object moves in the direction of the force.

## When two children of different weights balance on a seesaw they each produce equal torques in opposite directions?

This is the rotational motion equivalent to Newton’s first law. Two children can balance a seesaw when the weight of each produces an equal torque about the pivot in opposite directions (clockwise and counter clockwise).

## How do you calculate lifting force?

What is the lift formula? The lift formula is lift force, F = CL × q × A , where CL is lift coefficient, A is area, and q is dynamic fluid pressure.

## What force is used in lifting?

The weights are lifted by applying a force caused by the action of muscles of the person. Hence, it is a muscular force.

## Can we balance two persons of unequal weights on a see saw?

The seesaw principle: As you probably know, any two persons can balance each other when sitting on opposite sides of a seesaw, regardless of their weights. It is only necessary that each person contributes the same moment calculated by multiplying the person’s weight times the distance to the fulcrum.

## What law of motion is a seesaw?

They turn out to be exactly equal in amount, but opposite in direction. That’s an example of Newton’s third law of rotational motion, which observes that for every torque one object exerts on a second object, the second object exerts an equal, but oppositely directed torque back on the first object.

## How is bar torque calculated?

Measure the distance, r , between the pivot point and the point the force is applied. Determine the angle θ between the direction of the applied force and the vector between the point the force is applied to the pivot point. Multiply r by F and sin θ and you will get the torque.

## How do you calculate tension and torque?

The Torque/Tension Equation is a method used to estimate the torque/tension relationship in an assembly. T = (K D P)/12 can be used to developt a torque value that will achieve a certain tension or clamp load. T = Torque (ft. -lbs.)

## How do you write a torque equation?

Torque is defined as Γ=r×F=rFsin(θ). In other words, torque is the cross product between the distance vector (the distance from the pivot point to the point where force is applied) and the force vector, ‘a’ being the angle between r and F.

## What is the working principle of seesaw?

The working principle of seesaw is as follows- A seesaw is a sort of lever that is made up of a long plank and a pivot called the fulcrum. When you sit on one side of the beam and put weight on one end, it falls to the earth.

## How do you calculate lift and drag?

The lift coefficient is defined as: CL = L/qS , where L is the lift force, S the area of the wing and q = (rU2/2) is the dynamic pressure with r the air density and U the airspeed. Similarly, the drag coefficient is written as: CD = D/qS , where D is the drag force and the other symbols have the same meaning.

## How do I calculate thrust?

The force (thrust) is equal to the exit mass flow rate times the exit velocity minus the free stream mass flow rate times the free stream velocity.

## Is lifting force equal to weight?

Lift is the force that counteracts the weight of an object in order to keep it in the air. As the aircraft goes faster, lift increases until its force is equal to weight.

## How much force is required to move the weight?

The force (F) required to move an object of mass (m) with an acceleration (a) is given by the formula F = m x a. So, force = mass multiplied by acceleration.

## What will happen if two objects of the same mass is placed on the opposite ends of the seesaw?

Two people with the same body mass sitting on opposite sides of the beam can still change the balance and make the seesaw rotate by moving farther from or closer to the beam’s center.

## How much weight is required to balance the lever 15kg?

will be equal. The weight of the mass 15kg is 15gN and that of 24kg is 24gN.

## Why should the heavier person be closer to the object’s fulcrum than that of lighter person situated in a seesaw?

However, if you place a heavier object on one side and place it closer to the pivot point, balance can be achieved. This is because the center of the pivot can hold more weight than the other sides.

## What type of motion is motion of a swing?

i The motion of a swing is an example of rectilinear motion.