Physics Fall Exam 2024

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. It is directly related to the mass of the object; more mass means more inertia.

Front

State Newton's First Law of Motion.

Back

An object at rest will remain at rest, and an object in motion will continue to move at a constant velocity unless acted upon by an external force.

Front

What is momentum?

Back

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

Front

How does increasing the time of impact affect momentum change?

Back

Increasing the time of impact allows for a smaller force to be applied over a longer period, which can reduce the peak force experienced, but the total change in momentum remains the same.

Front

What is tangential speed?

Back

Tangential speed is the linear speed of an object moving along a circular path, calculated as the distance traveled along the circumference divided by the time taken.

Front

How do you calculate the tangential speed of an object in circular motion?

Back

Tangential speed (v) can be calculated using the formula v = 2πr/T, where r is the radius of the circle and T is the period of rotation.

Front

What is the principle of conservation of momentum?

Back

The principle states that in a closed system, the total momentum before an interaction is equal to the total momentum after the interaction, provided no external forces act on it.

Front

What happens to the velocity of an object when it is pushed off by another object?

Back

The velocity of the pushed object will depend on its mass and the velocity of the object doing the pushing, following the conservation of momentum.

Front

Define mass in physics.

Back

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

Front

What is the relationship between mass and inertia?

Back

The greater the mass of an object, the greater its inertia, meaning it will be harder to change its state of motion.