Free Fall motion

What happens to the velocity of a ball as it is dropped off a cliff? 

• It decreases at a uniform rate 
• It increases at a uniform rate 
• It is constant 
• It increases at a non-uniform rate

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

The acceleration of objects falling on Earth due to gravity is

• 9.8 m/s

• 9.8 m/s²

• 9.8 g/mL

• 9.8 g/m/m

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

What is the velocity of an object that has been falling freely in a vacuum for 2 seconds?

• 9.8 m/s down

• 10.1 m/s down

• 19.6 m/s down

• 39.2 m/s down

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Define acceleration due to gravity.

• The force of gravity acting on an object.

• The velocity of an object under the influence of gravity.

• The acceleration experienced by an object due to gravity.

• The force of gravity.

Tags

NGSS.MS-PS2-4

A girl drops a 7 gram bowling ball and a 1gram rock from a cliff. Which will hit the ground first?

• Bowling Ball

• Rock

• Ignoring air resistance, both will hit at the same time.

• The cliff

Tags

NGSS.HS-PS2-1

What does it mean for an object to be in free fall?

• Only air resistance acting on the object.

• Gravity is the only force acting on the obejct.

• Any object that is in downward motion.

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NGSS.MS-PS2-2

How much gravity an object has depends on its _________.

• Weight

• Speed

• Momentum

• Mass

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NGSS.HS-PS2-4

A car starts from rest at a stop light and reaches 20 m/s in 3.5 s. Determine the acceleration of the car.

• 2.2m/s²
• 7.0m/s²
• 5.7m/s²
• 70m/s²

Tags

NGSS.HS-PS2-1

"g" is defined as

• acceleration of all objects in motion

• acceleration of objects moving vertically

• acceleration of gravity

• none of the above

Tags

NGSS.HS-PS2-4

which is not a possible unit for time?

• min
• km
• sec
• hr