Simple Machines, Work, & Mechanical Advantage

Front

What is a simple machine?

Back

A simple machine is a device that changes the direction or magnitude of a force, making work easier. Examples include levers, pulleys, inclined planes, wedges, screws, and wheel and axles.

Front

Define mechanical advantage.

Back

Mechanical advantage is the ratio of the output force (load) to the input force (effort) in a machine. It indicates how much a machine multiplies force.

Front

How do you calculate the mechanical advantage of a lever?

Back

Mechanical advantage (MA) of a lever is calculated using the formula: MA = Length of Input Arm / Length of Output Arm.

Front

What is the formula for work done?

Back

Work done (W) is calculated using the formula: W = Force (F) x Distance (d) x cos(θ), where θ is the angle between the force and the direction of motion.

Front

If a force of 10 N is used to move an object 5 m, how much work is done?

Back

W = F x d = 10 N x 5 m = 50 J.

Front

What is an inclined plane?

Back

An inclined plane is a flat surface that is tilted at an angle to help lift objects. It reduces the amount of force needed to lift an object by increasing the distance over which the force is applied.

Front

How do you find the mechanical advantage of an inclined plane?

Back

The mechanical advantage of an inclined plane is calculated using the formula: MA = Length of Incline / Height of Incline.

Front

What is the relationship between work and energy?

Back

Work is a transfer of energy. When work is done on an object, energy is transferred to that object, resulting in a change in its energy state.

Front

What is a wedge?

Back

A wedge is a simple machine that consists of two inclined planes joined back to back. It is used to split, cut, or lift objects.

Front

How is the mechanical advantage of a wedge calculated?

Back

The mechanical advantage of a wedge is calculated using the formula: MA = Length of Wedge / Height of Wedge.