Projectile motion

Physics · Unit 3 — Gravity and electromagnetism · Gravity and motion

Learning objectives (21)

LO-1Apply vector analysis to resolve a vector into two perpendicular components.LO-2Describe how horizontal and vertical components of a velocity vector are independent of each other.LO-3Describe the concept of gravitational fields.LO-4Describe the concept of normal force.LO-5Describe the concept of uniform circular motion.LO-6Describe the concepts of average speed and period.LO-7Describe the concepts of centripetal acceleration and centripetal force.LO-8Describe the forces acting on an object on an inclined plane (e.g. force due to gravity, normal force, tension, frictional force and applied force) through the use of free -body diagrams.LO-9Describe the Law of Universal Gravitation.LO-10Describe the relationship between the Law of Universal Gravitation and uniform circular motion and recognise this as the third law of planetary motion.LO-11Determine the net force acting on an object on an inclined plane using vector analysis.LO-12Interpret data relating to the horizontal distance travelled by an object projected at various angles from the horizontal. Inclined planes and circular motion LO-13Solve problems involving force due to gravity (weight) and mass using 𝐹𝑔 = 𝑚𝑔.LO-14Solve problems involving forces acting on objects in uniform circular motion using 𝐹𝑐 = 𝐹𝑛𝑒𝑡 = 𝑚𝑣2 𝑟. Orbital mechanics LO-15Solve problems involving objects undergoing uniform circular motion at a constant speed using 𝑣 = 2𝜋𝑟 𝑇 and 𝑎𝑐 = 𝑣2 𝑟.LO-16Solve problems involving projectile motion in the absence of drag effects using 𝑣𝑦 = 𝑢𝑦 + 𝑔𝑡, 𝑠𝑦 = 𝑢𝑦 𝑡 + 1 2 𝑔𝑡2, 𝑣𝑦 2 = 𝑢𝑦 2 + 2𝑔𝑠𝑦, 𝑣𝑥 = 𝑢𝑥 and 𝑠𝑥 = 𝑢𝑥𝑡.LO-17Solve problems involving the gravitational field strength at a distance from an object using 𝑔 = 𝐹 𝑚 = 𝐺𝑀 𝑟2.LO-18Solve problems involving the magnitude of the gravitational force between two masses using 𝐹 = 𝐺𝑀𝑚 𝑟2.LO-19Solve problems involving the third law of planetary motion using 𝑇𝑎2 𝑟𝑎3 = 𝑇𝑏 2 𝑟𝑏 3 = 4𝜋2 𝐺𝑀. The following subject matter may be assessed in the internal assessments.LO-20Solve vector problems by resolving vectors into components, adding or subtracting the components and recombining them to determine the resultant vector.LO-21State the three laws of planetary motion.

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