Science 1st Quarter Past Paper 2024-2025 PDF

Science nini 1st quarter | School Year 2024 - 2025 2024 Magnetic forc...

Science nini 1st quarter | School Year 2024 - 2025 2024 Magnetic force (magnetic) 01. Nature of force - Force that exists in magnets. It is the force that makes magnets attract or ★ Force = Movement, mass, impact, push or repel objects on other magnets pull ★ Force can make an object move starting Newton's Law from a new position ★ Force can make an object to stop ★ Force can change the direction of a ★ Isaac newton created the Newton's law or moving object law of motion What are the types of forces? ○ he thought about his system of ○ Contact forces: forces where gravitation when he was hit upon object touch or contact with each an apple falling from the tree other ○ Non contact forces: forces where ☆ Newton’s first law of motion (Law of objects do not touch eachother Inertia) Types of contact forces: An object of rest tends to stay at rest and Normal force (Fnorm) an object in motion tends to stay in motion unless – referred to as the pressing force. Its acted upon an unbalanced force. action presses the surface together. Applied force (Fapp) ★ If objects in motion tend to stay in motion, - A force given to a person or why don’t moving objects move forever? things object by another person or don’t move forever because there is always an objects unbalanced force acting upon them (Friction) Frictional force (Ffric) - Opposes the motion of the object force ☆ Mass is the measure of the amount of exerted by the surface in contact with matter in an object (Mass = kg) each other Air resistance force (Fair) ★ Inertia is a property of an object that describes how much it will resist to change to the - Force that acts on an object as they motion of an object travel through the air Tensional force (Ftense) ☆ Newton’s second law of motion (Law of - Force which is transmitted through a acceleration) string, rope, or wine when it is pulled Newton's second law states that the acceleration of an tight by forces acting at each end object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass. Types of non contact forces Gravitational force (fgrav) The greater the force on the object, the greater the - Force within the earth, moon, or over acceleration. The greater the mass of an object, the massive bodies attracts an object lesser its acceleration. - Acceleration is measured in m/s² towards itself 1  Science nini 1st quarter | School Year 2024 - 2025 2024 - It is the rate of doing work ★ Newton’s third law of motion (Law of - It determines the length of time it takes for interaction) work to be finished Law of interaction is about forces acting - Ability to finish work in the shortest time separately on two bodies. It states that for every possible action there is an equal but opposite reaction - The faster a person works, the more power - Force is measured in N (Newtons) they exert Formulas Measuring power F = MA Power = W/T A=F/M W - Work M=F/A T - Time Units Work, power, and energy Power - W or watts Time - S or seconds ★ What is work? The product of force and Work - J or joules displacement of the object that moves under the influence of that force. Energy If there is no distance covered, no matter how hard you exert force, it is ★ What is energy? assumed that there is no work done. - It is the capacity or capability to do work ★ Formula - The greater the energy of a body, the - W = Work, F = Force, D = distance cosᶿ = greater is its capacity to perform any work angle ★ Two types of energy - W = FDcosᶿ - potential energy - kinetic energy ★ Units ★ What is potential energy? Work = J or joules - Energy stored in a body Force = N or newton Formula Distance = M or meter PEgrav = mgh (g = 9.8 m/s²) Acceleration = M/s² m = mass Mass = kg g = acceleration due to gravity h = height relative to the reference point Power ★ What is power? ★ Kinetic energy 2  Science nini 1st quarter | School Year 2024 - 2025 2024 - Anything that is moving - Energy of a body in motion - The kinetic energy of a body increases when the object is moving faster Formula: KE = mv² / 2 or ½ mv² Units: KE (Kinetic Energy) = Joules M (Mass) = kg V (Speed)² = m/s Try these problems ! 1. What is the potential energy of a rock that weighs 100 Newtons that is sitting on top of a hill 300 meters high? 2. If an object is accelerated from rest to a final velocity of 10m/s over the course of 2.5 seconds, what was the acceleration? 3