Description of the speed of the movement ----- speed] requires detailed steps! 1. A particle is on the x-axis and always moves in the positive direction of the x-axis. The position coordinates of each moment are shown in the table below t/s 0 2 4 6 8 10 12 14 16 18 x/m 2 4 6 8 8 8 12 16 20 24 (1) What is the displacement and distance of the particle in the first 10 seconds? (2) What is the instantaneous velocity of the particle at the end of 8s? (3) What is the average velocity of a particle between 0 and 18 seconds? 2. The speed of signal transmission along animal nerve is about 100 m / s. how long does it take for a 30 m whale to feel a bite from a shark on its tail? How long does it take for a 8 m whale to feel a bite from a mosquito on its foot?

Description of the speed of the movement ----- speed] requires detailed steps! 1. A particle is on the x-axis and always moves in the positive direction of the x-axis. The position coordinates of each moment are shown in the table below t/s 0 2 4 6 8 10 12 14 16 18 x/m 2 4 6 8 8 8 12 16 20 24 (1) What is the displacement and distance of the particle in the first 10 seconds? (2) What is the instantaneous velocity of the particle at the end of 8s? (3) What is the average velocity of a particle between 0 and 18 seconds? 2. The speed of signal transmission along animal nerve is about 100 m / s. how long does it take for a 30 m whale to feel a bite from a shark on its tail? How long does it take for a 8 m whale to feel a bite from a mosquito on its foot?

(1) The displacement and distance of the particle in the first 10 seconds are 8 m respectively. (t = 10 x = 8)
(2) What is the instantaneous velocity of the particle at the end of 8s?
T = 6 / 8 / 10jf x is 8. So the speed is 0
(3) How big is the particle between 0 and 18S?
Average velocity v = (24-2) / 18 = 1.22m/s
2、 T1 = 30 / 100 = 0.3s
t2=1.8/100=0.018s