Unit 4 Pre Assessment

Front

What is tangential velocity?

Back

Tangential velocity is the linear speed of an object moving along a circular path, measured at any point along the path. It is calculated as the product of the radius of the circular path and the angular velocity.

Front

How do you calculate tangential velocity?

Back

Tangential velocity (v) can be calculated using the formula: v = r * ω, where r is the radius of the circular path and ω is the angular velocity in radians per second.

Front

What is the relationship between radius and tangential velocity?

Back

Tangential velocity is directly proportional to the radius of the circular path. As the radius increases, the tangential velocity increases, assuming constant angular velocity.

Front

What is Newton's law of universal gravitation?

Back

Newton's 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

What is gravitational force?

Back

Gravitational force is the attractive force between two masses. It is calculated using the formula: F = G * (m1 * m2) / r^2, where G is the gravitational constant, m1 and m2 are the masses, and r is the distance between the centers of the two masses.

Front

What factors affect gravitational force?

Back

Gravitational force is affected by the masses of the objects and the distance between them. Greater mass results in a stronger gravitational force, while greater distance results in a weaker gravitational force.

Front

What is inertia?

Back

Inertia is the property of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion continues in motion at a constant velocity unless acted upon by an external force.

Front

Why does the moon orbit the Earth?

Back

The moon orbits the Earth due to the balance between its inertia (which wants to keep it moving in a straight line) and the gravitational pull of the Earth (which pulls it towards the Earth). This results in a curved path around the Earth.

Front

What is angular velocity?

Back

Angular velocity is the rate of change of angular position of an object in circular motion, typically measured in radians per second.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in kilograms, while weight is the force exerted by gravity on that mass, measured in newtons (N). Weight can change depending on the gravitational field strength.