**Physics Semester 1 Finals

Front

What is the principle of free fall in a vacuum?

Back

In a vacuum, all objects fall at the same rate regardless of their mass, due to the absence of air resistance.

Front

Define displacement in physics.

Back

Displacement is the vector quantity that represents the change in position of an object, measured from the initial to the final position.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration, often related to its height above the ground.

Front

At which point does a roller coaster have the highest potential energy?

Back

At the highest point of the track, where it is farthest from the ground.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) is calculated using the formula: a = (thrust - friction) / mass.

Front

How do you calculate power in physics?

Back

Power (P) is calculated using the formula: P = work done / time taken.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's second law, force (F) is equal to mass (m) times acceleration (a): F = m * a.

Front

What is the unit of power in the International System of Units (SI)?

Back

The unit of power is the Watt (W), which is equivalent to one Joule per second.

Front

Explain the concept of kinetic energy.

Back

Kinetic energy is the energy of an object in motion, calculated using the formula: KE = 1/2 mv², where m is mass and v is velocity.

Front

What happens to the potential energy of an object as it falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases, conserving total mechanical energy.