Ps 7 Review

Front

What is work in physics?

Back

Work is defined as the product of force and the distance over which that force is applied. It is measured in joules (J).

Front

How does lifting an object relate to work done?

Back

Lifting an object against gravity requires work, which increases with the height the object is lifted.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or height. It is calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What happens to potential energy as an object falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases, but the total mechanical energy remains constant.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials, where heat moves from the hotter object to the cooler one.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation from the sun.

Front

What is the relationship between force and work?

Back

Work is done when a force causes an object to move. The greater the force or distance, the more work is done.

Front

What is the formula for calculating work?

Back

The formula for work is W = Fd cos(θ), where W is work, F is force, d is distance, and θ is the angle between the force and the direction of motion.