Physics fall semester review

Front

What is the formula for calculating gravitational force between two objects?

Back

F = G * (m1 * m2) / r^2, where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between the centers of the two objects.

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = 1/2 mv^2, where m is mass and v is velocity.

Front

Why are padded dashboards safer in car collisions?

Back

Padded dashboards increase the time of impact, which reduces the force experienced by occupants, thus decreasing the risk of injury.

Front

What happens to an object's kinetic energy if friction is the only force acting on it?

Back

The kinetic energy of the object decreases due to the work done against friction.

Front

What is kinetic energy associated with?

Back

Kinetic energy is associated with an object in motion.

Front

What is the relationship between velocity and kinetic energy?

Back

The kinetic energy of an object increases as its velocity increases, since KE is proportional to the square of the velocity.

Front

What is the difference between potential energy and kinetic energy?

Back

Potential energy is stored energy based on an object's position, while kinetic energy is the energy of an object in motion.

Front

What is the principle of conservation of energy?

Back

The principle states that energy cannot be created or destroyed, only transformed from one form to another.

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, calculated as Impulse = Force x Time.

Front

How does increasing mass affect kinetic energy?

Back

Increasing the mass of an object increases its kinetic energy if its velocity remains constant, as KE is directly proportional to mass.