Unit IV Review - Uni. Grav, Circ. Motion, Impulse, Momentum

Front

What is impulse in physics?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time. It is calculated as the product of the average force and the time duration over which the force acts.

Front

How is momentum defined?

Back

Momentum is defined as the product of an object's mass and its velocity. It is a vector quantity, meaning it has both magnitude and direction.

Front

What is the formula for calculating momentum?

Back

The formula for momentum (p) is p = m * v, where m is mass and v is velocity.

Front

What happens to momentum in a closed system?

Back

In a closed system, the total momentum before an event (like a collision) is equal to the total momentum after the event, according to the law of conservation of momentum.

Front

What is gravitational force?

Back

Gravitational force is the attractive force between two masses. It depends on the masses of the objects and the distance between them.

Front

What is the relationship between distance and gravitational force?

Back

The gravitational force decreases as the distance between two objects increases. Specifically, it is inversely proportional to the square of the distance.

Front

What is circular motion?

Back

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

Front

What is the formula for centripetal force?

Back

The formula for centripetal force (Fc) is Fc = (m * v^2) / r, where m is mass, v is velocity, and r is the radius of the circular path.

Front

How does increasing the time of impact affect collision injuries?

Back

Increasing the time of impact reduces the force experienced during a collision, which can help to minimize injuries.

Front

What is the principle of conservation of momentum?

Back

The principle of conservation of momentum states that in the absence of external forces, the total momentum of a system remains constant.