QUIZ Freefall Regents

A baseball dropped from the roof of a tall building takes 3.1 seconds to hit the ground. How tall is the building? [Neglect friction.]

• 15 m

• 30 m

• 47 m

• 94 m

Tags

NGSS.HS-PS2-1

A rock falls from rest a vertical distance of 0.72 meter to the surface of a planet in 0.63 second. The magnitude of the acceleration due to gravity on the planet is

• 1.1 m/s²

• 2.3 m/s²

• 3.6 m/s²

• 9.8 m/s²

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Which graph best represents the relationship between the acceleration of an object falling freely near the surface of Earth and the time that it falls?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

A car with an initial velocity of 16.0 meters per second east slows uniformly to 6.0 meters per second east in 4.0 seconds. What is the acceleration of the car during this 4.0-second interval?

• 2.5 m/s² west

• 2.5 m/s² east

• 4.0 m/s² west

• 4.0 m/s² east

Tags

NGSS.HS-PS2-1

In an experiment that measures how fast a student reacts, a meter stick dropped from rest falls 0.20 meter before the student catches it. The reaction time of the student is approximately

• 0.10 s

• 0.20 s

• 0.30 s

• 0.40 s