PHYSICS MIDTERM REVIEW

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration. It is calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

How do you calculate potential energy for a mass at a height?

Back

Potential energy (PE) can be calculated using the formula PE = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (approximately 9.81 m/s² on Earth), and h is the height in meters.

Front

What is the formula for calculating speed of a falling object after a certain time?

Back

The speed (v) of a falling object can be calculated using the formula v = gt, where g is the acceleration due to gravity (approximately 9.81 m/s²) and t is the time in seconds.

Front

What is power in physics?

Back

Power is the rate at which work is done or energy is transferred. It is calculated using the formula P = W/t, where P is power, W is work done, and t is time taken.

Front

How do you calculate work done against gravity?

Back

Work done (W) against gravity can be calculated using the formula W = Fd, where F is the force (weight of the object) and d is the distance moved vertically.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object and is calculated as W = mg, where m is mass and g is the acceleration due to gravity. Mass remains constant regardless of location, while weight varies with gravity.

Front

What is inertia?

Back

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

Front

What is a vector?

Back

A vector is a quantity that has both magnitude and direction. Examples include displacement, velocity, and force.

Front

How do you find the resultant of two perpendicular vectors?

Back

The resultant of two perpendicular vectors can be found using the Pythagorean theorem: R = √(A² + B²), where A and B are the magnitudes of the two vectors.

Front

What is the significance of the acceleration due to gravity?

Back

The acceleration due to gravity (g) is the rate at which an object accelerates towards the Earth when in free fall. On Earth, g is approximately 9.81 m/s².