Physical Science Unit 6 Review

Front

What is the law of universal gravitation?

Back

The law of universal gravitation states that every point mass attracts every other point mass in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Front

Define mass.

Back

Mass is a measure of the amount of matter in an object, typically measured in kilograms (kg). It is a scalar quantity and does not change regardless of the object's location.

Front

Define weight.

Back

Weight is the force exerted by gravity on an object, calculated as the product of mass and the acceleration due to gravity (W = mg). It is measured in newtons (N).

Front

What is the difference between mass and weight?

Back

Mass is a measure of matter, while weight is the force of gravity acting on that mass. Mass is constant, but weight can change depending on the gravitational field.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object with respect to time. It is measured in meters per second squared (m/s²).

Front

What is the formula for calculating force?

Back

Force is calculated using Newton's second law: F = ma, where F is force, m is mass, and a is acceleration.

Front

What is the acceleration due to gravity on Earth?

Back

The acceleration due to gravity on Earth is approximately 9.81 m/s².

Front

What is displacement?

Back

Displacement is the vector quantity that represents the change in position of an object. It is the shortest distance from the initial to the final position, along with the direction.

Front

How do you calculate displacement from a velocity-time graph?

Back

Displacement can be calculated as the area under the velocity-time graph between two time points.

Front

What is the significance of a free-falling object?

Back

A free-falling object is one that is only influenced by gravity, experiencing constant acceleration downwards at approximately 9.81 m/s².