
(REVIEWER 2) 4thQ. Sci9
Quiz by Rizzel Joy Dotillos
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When an object is launched into the air, it follows a path known as trajectory. What is the shape of the path followed by a projectile neglecting air resistance?
One player throws the ball up and scored a point. As you watch the ball fly, you notice that it travels a certain distance horizontally. What is the term for the horizontal distance a ball travels during its flight?
There are many real-life scenarios where projectile motion can be observed. Which situation below shows the BEST example of a projectile motion?
In projectile motion, it is often assumed that air resistance is negligible so that the only force acting on the object is gravity. What will happen to the projectile when there is air resistance?
What must be the initial speed of an arrow shot at angle of 45⁰above the horizontal if its target is 2.0m away? (Please note this formula: R = vix2)
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What happens to the horizontal velocity of the arrow as it rises and then comes back down? The horizontal velocity _______________________________.

The angle at which the object is launched is called the angle of release. How does the angle of release affect the height of a projectile?
A ball is hit at an angle of 30⁰. At what point in its trajectory does this projectile have the least velocity?
Ignoring air resistance, at what angle should the soccer player hit the ball for maximum distance?

At what angle of release does the ball reach its maximum height?

Based on the illustration, which of the following statements is NOT TRUE?

During a basketball game, a player throws the ball towards the hoop. Considering the horizontal and vertical velocity components of the ball’s motion, what happens to its vertical velocity during its flight? It ________________________________________.
A cargo truck with a mass of 10,000 kilograms and a small car with a mass of 2, 000 kilograms, both traveling at 40km/hr suddenly lose their brakes and crash. Which would cause more damage and why?
Linear momentum is a measure of how difficult it is to change an object’s motion. What two factors are used to calculate an object’s linear momentum?
Two 0.5 kg balls approach each other in opposite direction with the same speed of 1.0 m/s. What is the total momentum of the system before collision?
In a physics experiment, a student used two carts on a track that are free to move and can collide with each other. What do you think will happen to the individual momentum of objects in an isolated system during the collision? They ________________.
You are boiling water on a stove. The heat from the stove causes the water to boil. What is heat in this scenario? A form of ________.
Work is a measure of energy transfer that occurs when an object is moved over a distance by an external force in the direction of the displacement. Consider this scenario: Jonathan is pushing the wall. Can this be considered work?
Some amount of energy is transferred by heat into a system. The net work done by the system is 50J, while the increase in its internal energy is 30J. What is the amount of net heat?
Heat can do work by transferring thermal energy from one system to another. Which of the following models best demonstrates that heat can do work?
Mechanical energy is associated with the motion of an object. What are the two types of mechanical energy?
Every moving object and particle have kinetic energy. What is the SI unit of kinetic energy?
A ball is dropped from a certain height. Which of the following best describes the changes in the ball's mechanical energy as it falls to the ground?
The law of conservation of mechanical energy arises from the broader concept of energy conservation in physics. Which of the following statements best describes the law of conservation of mechanical energy?
A box with a mass of 5 kg is lifted to a height of 6 m above the ground. What is the potential energy of the box at that height? (Assume gravitational acceleration is 9.8 m/s².)
The clock pendulum swings back and forth. Which of the following statements best describe the energy transformation that occurs as the pendulum swings?
You want to design an experiment to demonstrate the conservation of mechanical energy in a cart rolling down a ramp. Which of the following should be done best? Measure the___________________________.
A heat engine converts thermal energy into mechanical energy. Which component of a heat engine is responsible for this conversion?
Heat engines operate based on the principles of thermodynamics. What is the primary source of energy that heat engines utilize to perform work?
In a heat engine, energy undergoes several transformations as it moves through the various components and processes. What is the primary purpose of energy transformation in a heat engine?
Efficient heat engines are crucial for optimizing energy utilization and reducing waste. What is the role of energy transformation in the efficiency of a heat engine? Energy transformation_______.
A cylinder contains 3 moles of an ideal gas. The gas undergoes a process in which 800 J of heat is added to the system, and the gas does 400 J of work on the surroundings. What is the change in the internal energy of the gas during this process?

Two heat engines operate using the same high-temperature source, but Engine A produces more work output than Engine B. How would you analyze this situation in terms of heat transfer and energy transformation? Engine A must have_________________________________________________.
A student suggests that increasing the amount of heat transferred into a heat engine will automatically increase its work output. Is the student’s suggestion correct?
Electricity reaches far locations through a complex network of power generation, transmission, and distribution systems. Which of the following allows electricity to reach distant places?
Which term in electrical power systems refers to the production of electricity by the turning of turbines which allows for the conversion of energy from mechanical to electrical?
Distribution system of electrical energy is designed to ensure reliability, safety, and efficiency in supplying electricity to consumers. How is electrical energy distributed to homes and businesses from the electrical grid?
In a power transmission system, electrical energy is transmitted over long distances using high-voltage powerlines. Which of the following best explains the purpose of using high-voltage power lines? High voltage power lines ______________________________.
An area experiences frequent power outage due to outdated electrical infrastructure. How would you analyze the impact on electrical energy distribution?
The government is proposing to build a new power plant using fossil fuels. How will you evaluate the potential environmental impact of this decision? Fossil fuel power plants_________________________.