Work and Energy Flashcard Chapter 13

Front

What is a wheel and axle?

Back

A simple machine consisting of a circular wheel attached to a cylindrical axle, allowing for easier movement or lifting of objects. Example: A screwdriver.

Front

Which of the following is NOT a simple machine: a lever, a screw, or a pair of scissors?

Back

A pair of scissors is not considered a simple machine; it is a compound machine.

Front

What is mechanical advantage?

Back

A quantity that measures how much a machine multiplies force or distance.

Front

How is kinetic energy calculated?

Back

Kinetic energy (KE) is calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the kinetic energy of an object with a mass of 20 kg moving at 9 m/s?

Back

The kinetic energy is 810 J, calculated using KE = 1/2 mv².

Front

What is a screw in terms of simple machines?

Back

An inclined plane wrapped around a cylinder, used to convert rotational motion into linear motion.

Front

What is potential energy?

Back

The energy stored in an object due to its position or state, often related to height in a gravitational field.

Front

What is the formula for calculating work done?

Back

Work (W) is calculated using the formula W = Fd, where F is force and d is distance.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy; energy can be transferred or transformed but cannot be created or destroyed.

Front

What is a lever?

Back

A simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum.