A Rock, Dropped from Rest near the Surface of an Atmosphere-Free

question 101

Multiple Choice

A rock, dropped from rest near the surface of an atmosphere-free planet, attains a speed of 20.0 m/s after falling 8.0 meters.
-How long would it take the object, falling from rest, to fall 16 m on this planet?

• A)0.8 s
• B)1.1 s
• C)2.5 s
• D)3.5 s
• E)22 s

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