Physics Final Exam

Front

What happens to the potential energy of a roller coaster cart as it falls towards the ground?

Back

The potential energy decreases.

Front

What is the vertical acceleration of a soccer ball kicked at an angle of 50 degrees with an initial velocity of 36 m/s at point B?

Back

The vertical acceleration is -9.8 \frac{m}{s^2}.

Front

Define the difference between a vector quantity and a scalar quantity.

Back

A vector has a magnitude and direction, while a scalar has only a magnitude.

Front

What law explains the propulsion of a squid when it ejects water backward?

Back

This is explained by Newton's 3rd law.

Front

What does Newton's 2nd law state?

Back

Force equals mass times acceleration (F = ma).

Front

What is the formula for calculating potential energy?

Back

Potential energy (PE) is calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the formula for calculating kinetic energy?

Back

Kinetic energy (KE) is calculated as KE = \frac{1}{2}mv^2, where m is mass and v is velocity.

Front

What is the principle of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.