An airplane has a touchdown velocity of 75.0 knots and comes to rest in 400 ft. What is the airplane's average deceleration? How long does it take the plane to stop? [0.869 knot = 1.47ft/s]
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
v = d = df – di . a = v = vf – vi .
t t f – t I t t f – ti
vf = vi + a t v = ½ ( vf + vi )
d = ½ ( vf + vi ) t d = vi t + ½ a t2
vf2 = vi2 + 2 a d
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(6)21. An airplane has a touchdown velocity of 75.0 knots and comes to rest in 400 ft. What is the
airplane's average deceleration? How long does it take the plane to stop? [0.869 knot = 1.47ft/s]
23. The speedometer of a car reads 60.0 mph when the brakes are applied. The car comes to rest in
4.55 s. How far does the car travel before coming to rest?
25. A driver traveling at 25.0 mph sees the light turn red at the intersection. If her reaction time is
0.600 s, and the car can decelerate at 18.0 ft/s, find the stopping distance of the car. What
would the stopping distance be if the car were moving at 50.0 mph?
11.0.300 m
13. 1.86 ft/s2; 475 f
15. 54.5 mph (or 80
17. t 10 s: d= 147
t= 15 s: d= 33
t3D
= 20 s: d= 58
t= 25 s: d= 91
19.5.62 X 107 cm/
21. -20.2 ft/s; 6.29 s
23. 200 ft
25. 59.4 ft; 193 ft](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F27e7e80b-03df-453b-a555-8f500263e07b%2F224c9671-f0a4-42c8-879c-93a9b0869fa5%2Fxfy9tcb_processed.jpeg&w=3840&q=75)
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