The velocity of a falling object in a vacuum is directly proportional to the amount of time the object has been falling. If after 5 seconds an object is falling at a speed of 50 miles per hour, how fast will it be falling after 12 seconds?  Choose one.
A) 18 miles per hour	B) 120 miles per hour	C) 216 miles per hour	D) 1080 miles per hour	E) 5400 miles per hour
Since Velocity is proportional to Time   Velocity =k*Timewhere k is the constant of proportionality   Time= 5 seconds   Velocity = 5k = 50 miles per Hour   i.e. k = 10   i.e. The relation between Velocity and Time becomes   Velocity =10*Time   Time= 12 seconds   Velocity = 10*12= 
<gadget id="calculator">10*12</gadget>
<output>120</output>
120 miles per hour   Answer: Option 120 miles per hour
<result>B</result>
The velocity of a falling object in a vacuum is directly proportional to the amount of time the object has been falling. If after 5 seconds an object is falling at a speed of 50 miles per hour, how fast will it be falling after 12 seconds?