Unit 4 Pre Assessment

Front

What is the formula for calculating tangential velocity in circular motion?

Back

Tangential velocity (v) = radius (r) × angular velocity (ω).

Front

Define uniform circular motion.

Back

Uniform circular motion is the motion of an object traveling at a constant speed along a circular path.

Front

What happens to the velocity of an object in uniform circular motion when the centripetal force is removed?

Back

The object will move in a straight line at a constant velocity due to inertia.

Front

State Newton's law of universal gravitation.

Back

Every point mass attracts every other point mass 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 the relationship between gravitational force and distance according to Newton's law of universal gravitation?

Back

Gravitational force decreases with the square of the distance between two masses.

Front

How does mass affect gravitational force?

Back

Gravitational force increases with the mass of the objects involved.

Front

What is the significance of unbalanced forces in motion?

Back

Unbalanced forces cause an object to accelerate or change its state of motion.

Front

Calculate the tangential velocity of a 2.0 kg ball attached to a 0.75 m rope rotating at 2.5 radians/second.

Back

Tangential velocity = radius × angular velocity = 0.75 m × 2.5 rad/s = 1.875 m/s.

Front

What is the effect of doubling the distance between two masses on the gravitational force between them?

Back

The gravitational force becomes 1/4th of its original value.

Front

Explain the concept of centripetal force in circular motion.

Back

Centripetal force is the net force that acts on an object moving in a circular path, directed towards the center of the circle.