Gravity and Freefall 3.3

When an object is accelerating due to the force of gravity and no other force it is:

• changing direction

• motionless

• in free fall

• at terminal speed

Tags

NGSS.HS-PS2-1

Acceleration due to gravity is

• 9.8 m/s on Earth

• signified by the letter g

• a downward acceleration

• all of the above

Tags

NGSS.HS-PS2-4

Which of the following is a True statement:

• Weight is the force of gravity. on an object

• weight is a fundamental property of an object

• an object's weight is the same everywhere

• weight is measured in kg

Tags

NGSS.HS-PS2-4

A bungee jumper falls of a tower and travels for 2 seconds before the bungee acts on her. What was her average velocity during her free fall?

• 4.9 m/s

• 9.8 m/s

• 14.5 m/s

• 19.6 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

An object is dropped from rest and falls downward for 3 seconds. What is its average velocity (speed)?

• 1.6 m/s

• 9.8 m/s

• 14.7 m/s

• 29.4 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A 60 kg person travels to the moon where the value of g is 1.6 N/kg. What is the person's weight?

• 38 N

• 60 N

• 96 N

• 588 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A ball is dropped from the roof of a tall building it reaches the ground in 3 seconds. What is its velocity upon impact? Use v=gt

• 9.8 m/s

• 19.6 m/s

• 29.4 m/s

• 30 m/s

Use the same ball from problem #7. What is its average velocity?

• 9.8 m/s

• 14.7 m/s

• 29.6 m/s

• 30 m/s

The same ball from questions 7 and 8. What is the height of the building?

• 9.8 m

• 14.7 m

• 29.4 m

• 44.1 m

According to Legend Galileo dropped two balls from the Leaning Tower of Pisa. If one ball had a mass of 5 kg, and gravity is 9.8 m/s2, what was the weight of the ball in Newtons (N)?

• 49 N

• 1.96 N

• .5 N

• 14.8 N

Tags

NGSS.HS-PS2-1