SCIENCE (4TH MID)

• mass - amount of matter inside the body
• Projectile motion - is the motion of a body or object thrown near the earth's surface moving along a curved path due to the action of gravity alone.
• Projectile - object undergoing projectile motion
• range - is the horizontal distance reached by a projectile from the start to the end
• Trajectory - is the path followed of a projectile
• Maximum height - is the highest vertical distance a projectile
• The law of inertia - Based on Newton's first law, without gravity (outside force) it will continuously move with a constant speed in a straight line forever.
• linear momentum - when an object tends to move in a straight line
• momentum - it means progress
• conservation - is an overused word but rarely done
• momentum - of an object is a product of mass and velocity
• projectile motion - may be the motion of an object
• impulse - is a change of momentum or the product of force multiplied by time
• the momentum of an isolated object is constant
• momentum can be conserved. it is constant. it is conserved during collisions.
• PNP-HPG - The Philippine National Police-Highway Patrol Group
• PNP-HPG - takes charge in monitoring road accidents, one of the leading causes of death in the Philippines
• Types of road accidents - Drunk driving, Over speeding, Lose brakes, Mechanical malfunction, Overtaking, Bad turns and reverse
• Drunk driving - top cause of this accident is alcohol slows reflexes, weakens reasoning and affects one's motor skills.
• Over speeding - Blame it to adrenalin rush. Some people enjoy over speeding without thinking of the effect.
• Lose brakes - Check everything before you go especially the brakes
• Mechanical malfunction - have a regular check-up for cars especially before you go on long trips.
• Overtaking - Miscalculations do happen. Avoid collision by maintaining your speed and beware of the vehicles at your back.
• Bad turns and reverse - Adjusting speed and direction quick is not easy. Take time to charge your momentum. Very low impulse in dangerous in driving.
• There is an average of 227 road accidents per day according to MMDA
• Work - is done when a force is applied to a body, making it move to the direction parallel to the body
• Joule (J) - unit of work and honor of the English inventor James Prescott Joule.
• Power - is defined as the rate of doing work. It is how fast one can do work
• Watt/watts (W) - the unit of power and in honor of the Scottish inventor, James Watt
• Energy - is needed to effect a change on an object. This is defined as the capacity to do work
• What kind of energy you are giving if you lift a book to the top of the high shelf?

  gravitational potential energy
• What kind of energy are you giving if you stretch the bow and release the arrow?

  elastic potential energy
• Where all these force come from and it is from the food you in take to give you energy to work?

  chemical energy
• Mechanical energy - is the energy possessed by an object doe to its position (gravitational potential energy) or motion (kinetic energy)
• Who discovered the Law of Consevation of energy?

  James Prescott Joules
• Potential energy - energy at rest, even if it doesn't move it still has energy
• Kinetic energy - they can generate electricity
• can a energy be useless?

  Yes
• When you put battery on a flashlight where do potential energy be converted?

  Mechanical energy
• is work applied when you carry a box and going upstairs?

  Yes