Midterm Review #4 Circular Motion and Gravity

Front

What is circular motion?

Back

Circular motion is the motion of an object that revolves around a fixed point in a circular path. It can be uniform (constant speed) or non-uniform (changing speed).

Front

What is centripetal force?

Back

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

Front

What is the formula for centripetal acceleration?

Back

Centripetal acceleration (a_c) is given by the formula a_c = v²/r, where v is the tangential speed and r is the radius of the circular path.

Front

What is the relationship between speed and period in circular motion?

Back

The period (T) is the time taken for one complete revolution. The relationship is given by T = 2πr/v, where r is the radius and v is the speed.

Front

What is gravitational force?

Back

Gravitational force is the attractive force between two masses. It is described by Newton's law of universal gravitation: F = G(m₁m₂)/r².

Front

How does distance affect gravitational force?

Back

As the distance between two objects increases, the gravitational force between them decreases, following an inverse square relationship.

Front

What is the period of a pendulum?

Back

The period of a simple pendulum is the time it takes to complete one full swing back and forth, given by T = 2π√(l/g), where l is the length and g is the acceleration due to gravity.

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 (W = mg).

Front

What is the role of tension in circular motion?

Back

Tension is the force exerted by a string or rope that keeps an object moving in a circular path, providing the necessary centripetal force.

Front

What is the concept of angular velocity?

Back

Angular velocity is the rate of change of angular displacement, usually measured in radians per second. It describes how fast an object rotates.