<p>A small airplane has an airspeed (speed with respect to air) of&#160;<span>16

Question

<p>A small airplane has an airspeed (speed with respect to air) of&#160;<span>160</span>&#160;<img src="http://session.masteringphysics.com/render?units=km%2Fh" alt="km/h" align="middle" />.</p>
<p>A)Find the time for the airplane to travel 1000&#160;<img src="http://session.masteringphysics.com/render?tex=%7B%5Crm+km%7D" alt="{ m km}" align="middle" />&#160;if there is no wind.</p>
<p>t=__________h</p>
<p>B)Find the time for the airplane to travel 1000km if there is a headwind of 35 km/h.</p>
<p>t=_________h</p>
<p>C) Find the time for the airplane to travel 1000km if there is a tailwind of 35 km/h.</p>
<p>t=________h</p>

Explanation / Answer

if no wind, air speed = ground speed (1000 km)/(160 km/h) = 6.25 hrs with head wind, ground speed is air speed minus the wind (1000km)/(160-35) = 8 hrs with tail wind, ground speed is air speed plus the wind (1000km/(160+35 km/h) = 5.13 hours

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