Free Fall

Free fall is

• moving through the air under the influence of the force of gravity only.

• not paying for a fall.

• clothing sale with lots of orange & brown clothes.

• a feather dropped from an airplane.

Tags

NGSS.MS-PS2-4

What is the average acceleration due to gravity on the earth?

• -12.4 m/s²

• -9.8 m/s²

• -7.2 m/s²

• -1.8 m/s²

Tags

NGSS.HS-PS2-4

What makes life easier?

• fried fish with bones in it

• watermelons with seeds

• using -10 m/s² for acceleration due to gravity

• timed exams

What does acceleration due to gravity mean?

• an object gains 10 m/s every second it falls

• an object falls at a constant velocity of 10 m/s

• an object loses 10 m/s every second it rises

• Dear Diary, why did I take this class????

Tags

NGSS.HS-PS2-4

If a ball is thrown up at 40 m/s, how many seconds does it take reach the top of its path? (Assume no air resistance)

• 8 s

• 4 s

• 10 s

• 0.1 s

Tags

NGSS.HS-PS2-4

If a ball is thrown straight up with a velocity of 30 m/s, how long until it can be caught at the same height? (Assume no air resistance)

• 3 s

• 6 s

• 10 s

• 1.5 s

If a ball is dropped, what is the speed of the ball 3 seconds later? (Assume no air resistance)

• 30 m/s

• -30 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

If a ball is dropped, what is the velocity of the ball 3 seconds later? (Assume no air resistance)

• 30 m/s

• -30 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

If a ball is thrown downward at 30 m/s, what will its velocity be at 4 s? (Assume no air resistance)

• -40 m/s

• -70 m/s

• -50 ms

• -10 m/s

Tags

NGSS.HS-PS2-1

If a ball is thrown up at 30 m/s at the edge of a cliff, what is the velocity 5 s later? (Assume no air resistance)

• -50 m/s

• -10 m/s

• -30 m/s

• -20 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4