Unit 5 Review

Front

What is the formula for calculating work?

Back

W = F * d, where W is work, F is force, and d is distance.

Front

What is the unit of work in the International System of Units (SI)?

Back

The unit of work is the Joule (J).

Front

How do you calculate the work done by a firefighter climbing a ladder?

Back

Work is calculated by multiplying the force (weight) by the distance climbed.

Front

What is kinetic energy (KE)?

Back

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

Front

What is potential energy (PE)?

Back

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

Front

What does it mean for energy to be conserved?

Back

Energy conservation means that the total energy in a closed system remains constant over time.

Front

What is the relationship between kinetic energy and potential energy in a closed system?

Back

In a closed system, the total mechanical energy (KE + PE) remains constant if no external work is done.

Front

What happens to potential energy as an object falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases.

Front

What is the effect of friction on energy conservation?

Back

Friction converts mechanical energy into thermal energy, which can lead to a loss of mechanical energy in a system.

Front

How does mass affect kinetic energy?

Back

Kinetic energy is directly proportional to mass; doubling the mass of an object doubles its kinetic energy if velocity remains constant.