Forces and Energy Review

Front

What is an independent variable?

Back

An independent variable is a factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

What is kinetic energy?

Back

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

Front

How do you calculate average speed?

Back

Average speed is calculated by dividing the total distance traveled by the total time taken, using the formula: Average Speed = Total Distance / Total Time.

Front

What is displacement?

Back

Displacement is the shortest distance from the initial to the final position of an object, taking into account the direction.

Front

What is the formula for kinetic energy?

Back

The formula for kinetic energy is KE = 1/2 mv², where m is mass and v is velocity.

Front

What happens to kinetic energy if the speed of an object doubles?

Back

If the speed of an object doubles, its kinetic energy increases by a factor of four, since KE is proportional to the square of the velocity.

Front

What is the relationship between height and potential energy?

Back

Potential energy increases with height; the higher an object is, the more potential energy it has, calculated using PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

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

Back

The unit of energy in the SI system is the Joule (J).

Front

What is the effect of friction on motion?

Back

Friction opposes the motion of an object, causing it to slow down or stop.