Physics Principles and Problems 2009

Section 3.3 : Free Fall

Self-Check Quizzes

1
Who studied gravity 400 years ago?
A)Charles Darwin
B)Galileo Galilei
C)John Dalton
D)Antonie Lavoisier
2
_____ is the motion of a body when air resistance is negligible and the action can be considered due to gravity alone.
A)Free fall
B)Free flight
C)Negative fall
D)Zero-gravity fall
3
At what time is the object's velocity zero?

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A)1 s
B)2 s
C)3 s
D)4 s
4
A ball falls freely from rest for 15.0 s. Calculate the ball's velocity.
A)78 m/s
B)-78 m/s
C)147 m/s
D)-147 m/s
5
A 75-kg swimmer steps off of a 10.0 tower. What is the swimmer's velocity on hitting the water?
A)- 14.0 m/s
B)27.1 m/s
C)0.25 m/s
D)38.3 m/s
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