Motion
Muhtasari
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.
Malengo
- 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
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
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.
- 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
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
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.
Pakua Programu Kwenye Google Playstore
Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.
