MP2 FINAL Exam Redo 2024-25

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, it is expressed as W = F * d * cos(θ), where θ is the angle between the force and the direction of motion.

Front

In which situation is no work being done?

Back

No work is done when a force is applied but there is no displacement. For example, a hockey puck sliding on ice at a constant speed experiences no net force acting on it, thus no work is done.

Front

What does MAX PE stand for in energy diagrams?

Back

MAX PE stands for Maximum Potential Energy, which occurs at the highest point in a system where the energy is stored due to position.

Front

What is the relationship between potential energy (PE) and kinetic energy (KE) at the point of equal energy?

Back

At the point of equal potential energy (PE) and kinetic energy (KE), the total mechanical energy of the system is conserved, meaning the sum of PE and KE remains constant.

Front

How do you calculate the time an object is in the air when thrown vertically?

Back

Front

What is the formula to calculate horizontal velocity?

Back

Front

How do you determine the time of flight for a projectile?

Back

Front

What is the significance of the horizontal velocity in projectile motion?

Back

Horizontal velocity remains constant in projectile motion, as there are no horizontal forces acting on the object (ignoring air resistance). This means the horizontal distance can be calculated using the time of flight.

Front

What is the formula for calculating the maximum height of a projectile?

Back

Front

What is the effect of air resistance on projectile motion?

Back

Air resistance opposes the motion of a projectile, reducing its range and maximum height compared to a vacuum where no air resistance is present.