Motion
Muhtasari
A delivery van leaves a depot at half past seven and returns four hours later. Nobody followed it. Nobody watched it park, pull away, sit in traffic or take the long way round the ring road. Yet the tracker in the cab hands the depot manager a single line on a chart, and from that line alone she can say when the van was moving, when it stopped, which leg of the journey was the fastest and how far it went in total. The line is a distance-time graph, and reading one is a skill you can learn in an afternoon and use for the rest of your life.
This lesson teaches you to read that line and to do arithmetic with it. You will meet the one equation the Physics Equation sheet prints for this topic, learn why physicists insist on two words for going fast rather than one, and find out how a slope on a piece of graph paper turns into a number in metres per second. By the end you will be able to look at a set of coordinates you have never seen before and describe the journey they record, which is exactly what the physics paper will ask you to do, on both tiers.
Malengo
- If an object moves in a straight line, its distance from a certain point can be represented by a distance-time graph.
- The speed of the object can be calculated from the gradient of a distance-time graph.
- The velocity, v, of an object is its speed in a given direction and is given by the equation: where s is the displacement and t is the time taken.
- This equation can also be used to calculate the average speed of objects undergoing non-uniform motion.
Ramani ya mawazo
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Maelezo ya Somo
Dokezo Kamili la Somo Linapatikana kwenye Programu ya Green Bridge
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Motion. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Which of these quantities is a vector? A. Distance B. Speed C. Time D. Velocity Answer: D
- What does the gradient of a distance-time graph represent? A. The acceleration of the object B. The speed of the object C. The distance travelled by the object D. The total time of the journey Answer: B
- A distance-time graph for an object is a horizontal straight line for 20 seconds. What is the object doing during those 20 seconds? A. Moving at a constant speed B. Speeding up C. Slowing down D. At rest Answer: D
- A tram travels at a constant velocity of 12 m/s for 90 s. How far does it travel in that time? A. 7.5 m B. 102 m C. 1080 m D. 1350 m Answer: C
- The equation v = s / t is rearranged to make t the subject. Which is correct? A. t = v x s B. t = s / v C. t = v / s D. t = s x v Answer: B
Fanyia kazi maswali haya kwenye programu
Fanyia kazi maswali haya kwenye programu
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Motion? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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