Someone was cruising along the left side of thehockey rink at a certain initial speed.He then suddenly accelerated for 0.8 s and reached9.5 m/s speed to catch a pass from a teammate.If the acceleration was at a rate of 6.5m/s2,(a) What was his initia
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Someone was cruising along the left side of the
hockey rink at a certain initial speed.He then suddenly accelerated for 0.8 s and reached
9.5 m/s speed to catch a pass from a teammate.If the acceleration was at a rate of 6.5
m/s2,
(a) What was his initial speed?
(b) How long was the distance he accelerated?
answer:
a) initial speed = 4.3m/s (solution:v = 9.5 - 6.5 * 0.8)
b) distance = 5.52m (solution:d = (4.3 + 9.5)/2 * 0.8)
so,i d't kn.
V末=V初+at V初=4.3m/s
S=V初+1/2at~2 自己算吧 我时间不多
Initial speed: x+0.8*6.5=9.5 so x=4.3m/s
Distance: Y =1/2*6.5*0.8^2=2.08m
cruising love
Someone was cruising along the left side of thehockey rink at a certain initial speed.He then suddenly accelerated for 0.8 s and reached9.5 m/s speed to catch a pass from a teammate.If the acceleration was at a rate of 6.5m/s2,(a) What was his initia
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