ON21 P23 Q3 Aircraft Forces and Sound | Oct/Nov 2021 | Cambridge A Level 9702 Physics
9702/23/O/N/21: (a) Define velocity. #9702w21p23
(b) A remote-controlled toy aircraft is flying horizontally in a wind. Fig. 3.1 shows the velocity vectors, to scale, of the wind and of the aircraft in still air. The velocity of the aircraft in still air is 42 m s–1 to the north. The velocity of the wind is 23 m s–1 in a direction of 54° east of south. Determine the magnitude of the resultant velocity of the aircraft. #ASvectorsP2
(c) The engine of the aircraft in (b) stops. The aircraft then glides towards the ground with a constant velocity at an angle θ to the horizontal, as illustrated in Fig. 3.2. The aircraft has a weight of 46 N and travels a distance of 280 m from point X to point Y. The change in gravitational potential energy of the aircraft for its movement from X to Y is 6100 J.
Assume that there is now no wind.
(i) Calculate angle θ.
(ii) Calculate the magnitude of the force acting on the aircraft due to air resistance.
#ASenergyP2 #ASfrictionP2
(d) The aircraft in (c) travels from X to Y in a time of 14 s. Fig. 3.3 shows that, as the aircraft travels from X to Y, it moves directly towards an observer who is standing on the ground. The aircraft emits sound as it travels from X to Y. The observer hears sound of frequency
450 Hz. The speed of the sound in the air is 340 m s–1. Calculate the frequency of the sound that is emitted by the aircraft.
#ASdopplerP2 #Lv2
ON21 Paper Discussion Playlist
• 9702 ON21 Papers CAIE Physics
#WorkEnergyPower Playlist
• Ch5 Work Energy Power | CAIE 9702 AS ...
#Waves Playlist:
• Ch7 Waves | CAIE 9702 AS Physics
Instagram Pocket Guide ( / etphysics )
More Resources (https://9702-physics.blogspot.com/)
Support us! ( / etphysics )
Tuition/Tutoring inquiries:
Email: [email protected]
Whatsapp: https://wa.me/60126679171
#CambridgeALevelPhysics
9702_w21_qp23
Watch video ON21 P23 Q3 Aircraft Forces and Sound | Oct/Nov 2021 | Cambridge A Level 9702 Physics online without registration, duration hours minute second in high quality. This video was added by user ETphysics 16 May 2022, don't forget to share it with your friends and acquaintances, it has been viewed on our site 6,63 once and liked it 9 people.