Physics Honors - 2nd Quarter Review

Front

What is the formula to calculate gravitational potential energy?

Back

Gravitational potential energy (PE) is calculated using the formula: PE = mgh, where m is mass (kg), g is acceleration due to gravity (9.8 m/s²), and h is height (m).

Front

What is the definition of work in physics?

Back

Work is defined as the product of the force applied to an object and the distance over which that force is applied, in the direction of the force. Mathematically, Work (W) = Force (F) × Distance (d) × cos(θ), where θ is the angle between the force and the direction of motion.

Front

How do you calculate the normal force acting on an object on a surface?

Back

The normal force (N) can be calculated using the equation: N = mg - P sin(θ), where m is mass, g is acceleration due to gravity, P is the applied force, and θ is the angle of the applied force.

Front

What is the difference between mass and weight?

Back

Mass is a measure of the amount of matter in an object (measured in kg), while weight is the force exerted by gravity on that mass (measured in Newtons, N). Weight can be calculated as Weight = mg.

Front

What is a perfectly inelastic collision?

Back

A perfectly inelastic collision is a type of collision where two objects collide and stick together, moving as a single object after the collision. Kinetic energy is not conserved, but momentum is.

Front

What is the formula for calculating the work done against friction?

Back

The work done against friction can be calculated using the formula: Work = Frictional Force (f) × Distance (d).

Front

What is the principle of conservation of momentum?

Back

The principle of conservation of momentum states that the total momentum of a closed system remains constant if no external forces act on it. This means that the momentum before a collision equals the momentum after the collision.

Front

How do you calculate the power output of an object?

Back

Power (P) is calculated as the work done (W) over time (t): P = W/t. It is measured in Watts (W), where 1 W = 1 J/s.

Front

What is the significance of the angle in work calculations?

Back

The angle (θ) in work calculations determines the component of the force that acts in the direction of the displacement. Only the component of the force in the direction of motion does work.

Front

What is the formula for kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula: KE = 1/2 mv², where m is mass and v is velocity.