Tandem jump

During the tandem jump, the paratroopers dropped from a height of 1.7 km to a height of 1.5 km above the surface in 4 seconds. At what average speed did they move before the parachute opened?

Correct answer:

v =  180 km/h

Step-by-step explanation:

s1=1.7 km s2=1.5 km t=4 s h=4:3600  h=0.00111 h  s=s1s2=1.71.5=51=0.2 km  v=s/t=51/t=0.2/0.0011=180 km/h



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