[題目] 我重修物理~可是完全看不懂= =
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[題目]
物理重修 我是物理白吃= =
(1)a bus slows down with constant acceleration from 12 m/s to 8 m/s
moves 40 m in this process (a)How much further does it travel from
beginning to stop? (b)How long does it take to stop from 8 m/s
(2)Suppose that ball is thrown upward at arrive a maximum height 19.6m
above the cliff,so that the ball can fall to the base of the cliff 58.6m
below. (a)What is the initial velocity (b)How long does it take the ball
to reach the base of the cliff?
(3)An object moves along the X-axis according the equation x = 2t^2 -4t +1
where x is in meters and t is in seconds. Find (a) the instantaneous
velocity and acceleration at t=2s; (b)the average velocity and acceleration
from t=1.5s to t=2.5s
(4)A car travels with speed 40km/h to north of east 37度 in the first 30分鐘
and with the speed 30km/h to north in next 30分鐘 finally with 50km/h to
south of east 53度 in last 1 hour. Find (a)the total travel distance ?
(b) the final position relative the origin position?
拜託版上的物理高手們
幫幫重修物理很可憐的我
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