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3 years ago

An airplane flies 40km directly south in 10 minutes and 20 km directly east in five minutes, its average speed is:

2 answers:

8 0

Average speed = total distance / total time
total distance = 40 + 20 = 60km
total time taken = 10 + 5 = 15 minutes
Average speed = 60/15 = 4km/min

Zina [86]3 years ago

3 0

Answer:

D. 4km/min

Explanation:

Since the question deals with "speed" and not "velocity", the direction does not matter.

the plane covers 40 + 20 km=60km in 10mins +5 mins=15mins

60 km - 15 mins

1min- 60÷15= 4 mins

therefore, your answer is D. 4km/min

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3 years ago

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Robin Hood wishes to split an arrow already in the bull's-eye of a target 40 m away.

tamaranim1 [39]

Answer:

5.843 m

Explanation:

suppose that the arrow leave the bow with a horizontal speed , towards he bull's eye.

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time = 40/ 37 = 1.081 s

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applying motion equation

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$s=ut+\frac{1}{2}*gt^{2} \\= 0+\frac{1}{2}*10*1.081^{2}\\= 5.843 m$

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3 years ago

Why do raindrops fall with a constant speed during the later stages of their descents?

BartSMP [9]

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3 years ago

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