.a. 0.75 m/s b. 1.49 m/s Speed-Time Graphs P 15 a. AB – constant speed DE – negative acceleration – BC negative acceleration 2. Graphs to be drawn – b. AB acceleration BC – constant speed CD – acceleration – c. AB negative acceleration BC – zero speed CD – acceleration Using Speed-Time Graphs to Calculate Distance P 16, 17, 18, 19 a. 20 m a. 0 – 20 s constant speed b. 180 m 20 – 30 s negative acceleration – c. 650 m 30 40 s constant d. 300 m 40 – 50 s negative acceleration e. 550 m 50 – 60 s constant speed – f. 300 m 60 70 s negative acceleration – g. 693 m 70 80 s constant speed h. 4000 m 80 – 90 s negative acceleration i. 220 m b. 1100 m a. 8 s seeing accident a. At 10 seconds b. 200 m b. 160m c. 250 m a. 500 m – a. 0 50 s acceleration b. deceleration for 560m so – 50 70 s constant speed that the rocket reaches a point 70 – 80 s acceleration 20m above the Moon and 80 – 90 s constant hovers. b. 1700 m a. 5s
.a. 0.75 m/s b. 1.49 m/s Speed-Time Graphs P 15 a. AB – constant speed BC – negative acceleration b. AB – acceleration BC – constant speed CD – acceleration c. AB – negative acceleration BC – zero speed CD – acceleration DE – negative acceleration 2. Graphs to be drawn Using Speed-Time Graphs to Calculate Distance P 16, 17, 18, 19 a. 20 m b. 180 m c. 650 m d. 300 m e. 550 m f. 300 m g. 693 m h. 4000 m i. 220 m a. 8 s seeing accident b. 200 m c. 250 m a. 0 – 50 s acceleration 50 – 70 s constant speed 70 – 80 s acceleration 80 – 90 s constant b. 1700 m a. 0 – 20 s constant speed 20 – 30 s negative acceleration 30 – 40 s constant 40 – 50 s negative acceleration 50 – 60 s constant speed 60 – 70 s negative acceleration 70 – 80 s constant speed 80 – 90 s negative acceleration b. 1100 m a. At 10 seconds b. 160m a. 500 m b. deceleration for 560m so that the rocket reaches a point 20m above the Moon and hovers. a. 5s
DS-N45-Question-book-1-Dynamics.docx