Motion
Overzicht
Everything around you is either moving or could be set moving, and physics begins by describing that motion precisely. How fast is a sprinter going? Is a car speeding up or slowing down? How far does a dropped stone fall in two seconds? Every one of these questions is answered with a handful of equations and two simple graphs.
In this lesson you will define speed, velocity and acceleration, then read and draw distance-time and speed-time graphs with confidence. You will calculate speed from a gradient, distance from an area, and handle free fall and terminal velocity. By the end you should be able to look at a graph and tell its whole story.
Doelstellingen
- Define speed as distance travelled per unit time; recall and use the equation s v = t
- Define velocity as speed in a given direction
- Recall and use the equation total distance travelled average speed = total time taken
- Sketch, plot and interpret distance-time and speed-time graphs
- Determine, qualitatively, from given data or the shape of a distance-time graph or speed-time graph when an object is: (a) at rest (b) moving with constant speed (c) accelerating (d) decelerating
- Calculate speed from the gradient of a straight- line section of a distance-time graph
- Calculate the area under a speed-time graph to determine the distance travelled for motion with constant speed or constant acceleration
- State that the acceleration of free fall g for an object near to the surface of the Earth is approximately constant and is approximately
- [Supplement] Define acceleration as change in velocity per unit time; recall and use the equation ∆v a = ∆t
- [Supplement] Determine from given data or the shape of a speed-time graph when an object is moving with: (a) constant acceleration (b) changing acceleration
- [Supplement] Calculate acceleration from the gradient of a speed-time graph
- [Supplement] Know that a deceleration is a negative acceleration and use this in calculations
- [Supplement] Describe the motion of objects falling in a uniform gravitational field with and without air/ liquid resistance, including reference to terminal
Lesnotitie
Beschikbaar in de Green Bridge-app
Download de Green Bridge CBT-app op je telefoon of computer voor toegang tot volledige lesnotities, oefenvragen en meer.
Lesevaluatie
Gefeliciteerd met het voltooien van de les op Motion. Nu je de sleutelconcepten en ideeën, het is tijd om uw kennis op de proef te stellen. Deze sectie biedt een verscheidenheid aan oefeningen vragen die bedoeld zijn om uw begrip te vergroten en u te helpen uw begrip van de stof te peilen.
Je zult een mix van vraagtypen tegenkomen, waaronder meerkeuzevragen, korte antwoordvragen en essayvragen. Elke vraag is zorgvuldig samengesteld om verschillende aspecten van je kennis en kritisch denkvermogen te beoordelen.
Gebruik dit evaluatiegedeelte als een kans om je begrip van het onderwerp te versterken en om gebieden te identificeren waar je mogelijk extra studie nodig hebt. Laat je niet ontmoedigen door eventuele uitdagingen die je tegenkomt; beschouw ze in plaats daarvan als kansen voor groei en verbetering.
- A car travels 150 m in 10 s. Its average speed is: A. 1.5 m/s B. 15 m/s C. 150 m/s D. 1500 m/s Answer: B
- On a distance-time graph, a horizontal line means the object is: A. accelerating B. moving at constant speed C. at rest D. decelerating Answer: C
- On a speed-time graph, the distance travelled is given by: A. the gradient of the line B. the area under the line C. the highest point D. the time axis intercept Answer: B
- A car speeds up from 10 m/s to 30 m/s in 5 s. Its acceleration is: A. 2 m/s2 B. 4 m/s2 C. 6 m/s2 D. 100 m/s2 Answer: B
- A skydiver reaches terminal velocity when: A. weight is zero B. drag is zero C. drag equals weight D. the parachute opens Answer: C
Beschikbaar in de Green Bridge-app
Download de Green Bridge CBT-app op je telefoon of computer voor toegang tot volledige lesnotities, oefenvragen en meer.
Beschikbaar in de Green Bridge-app
Download de Green Bridge CBT-app op je telefoon of computer voor toegang tot volledige lesnotities, oefenvragen en meer.
Aanbevolen Boeken
Oefen Proefexamenvragen
Wilt u proefexamenvragen over Motion oefenen? Download de Green Bridge CBT-app voor toegang tot proefexamenvragen en volledige oefentoetsen over dit onderwerp.
Download de app in de Google Playstore
Alles wat je nodig hebt om uit te blinken in JAMB, WAEC en NECO.
