Free Fall Review

Earth's acceleration due to gravity is...

• 18.2 m/s²

• -9.8 m/s²

• 9.8 m/s

• -18.2 m/s²

Tags

NGSS.HS-PS2-4

If Tony wants to calculate how long it would take his ball to hit the ground from a 10 meter high bridge. Which equation should he use?

•  $v_f=v_o+at$  

•  $a=\ \frac{\left(2\left(\left[x_f-x_o\right]-v_ot\right)\right)}{t^2}$  

•  $t\ =\ \sqrt{\frac{\left(x_f-x_o\right)}{a}}$  

•  $v=\ \frac{d}{t}$  

Tags

NGSS.HS-PS2-4

Daniel drops a marble from the edge of the table.  Abigail timed how long it took to hit the ground.  Which equation should they use to calculate the velocity of the ball when it hit the ground?

•  $v_f=v_o+at$  

•  $a=\ \frac{\left(2\left(\left[x_f-x_o\right]-v_ot\right)\right)}{t^2}$  

•  $t\ =\ \sqrt{\frac{\left(x_f-x_o\right)}{a}}$  

•  $v=\ \frac{d}{t}$  

Tags

NGSS.HS-PS2-1

Isabela is the first astronaut to walk on Planet X.  As a part of her scientific explorations, she must calculate the acceleration due to gravity on this new planet.  Which equation should she use?

•  $v_f=v_o+at$  

•  $a=\ \frac{\left(2\left(\left[x_f-x_o\right]-v_ot\right)\right)}{t^2}$  

•  $t\ =\ \sqrt{\frac{\left(x_f-x_o\right)}{a}}$  

•  $v=\ \frac{d}{t}$  

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A textbook is dropped from a second floor window and falls to the ground. What happens to the velocity as the book falls to the ground

• the velocity increases

• the velocity decreases

• the velocity remain constant

Tags

NGSS.HS-PS2-1

A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground

• the acceleration increases

• the acceleration decreases

• the acceleration remains constant

Tags

NGSS.HS-PS2-1

Which one falls faster in vacuum? An elephant or a leaf?

• Elephant

• Leaf

• They are the same

• Nothing can be said

Tags

NGSS.MS-PS2-4

If you drop a ball from the top of a building, estimate what the velocity will be after 6 seconds? (Assume gravity is -10m/s/s for this problem)

• -10 m/s

• -10 m/s/s

• -60 m/s

• -60 m/s/s

Tags

NGSS.HS-PS2-1

Calculate acceleration due to gravity on a mysterious planet that takes an object 0.5 seconds to free fall a distance of 100 meters. The initial velocity is zero.

• 400

• 800

• 200

• 600

Tags

NGSS.HS-PS2-1

How long will it take for tomato to hit the ground if it is dropped from a height of 100 meters. (g = -9.8m/s²)

• 5.01 seconds

• 10.2 seconds

• 3.19 seconds

• 7.03 seconds

Tags

NGSS.HS-PS2-1