Free fall motion

Free fall is any motion of a body where ____ is the only force acting upon it.

• body attraction

• tension

• gravity

• velocity

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

TRUE or FALSE:

An object that is free-falling is acted upon by the force of gravity alone.

• TRUE

• FALSE

Tags

NGSS.HS-PS2-4

TRUE or FALSE:

A ball is thrown upwards and is rising towards its peak. As it rises upwards, it is NOT considered to be in a state of free fall.

• TRUE

• FALSE

Tags

NGSS.HS-PS2-4

TRUE or FALSE:

An object in free fall experiences an acceleration which is independent of the mass of the object.

• TRUE

• FALSE

Tags

NGSS.HS-PS2-1

 

TRUE or FALSE:

A ball is thrown upwards, rises to its peak and eventually falls back to the original height. As the ball rises, its acceleration is upwards; as it falls, its acceleration is downwards.

• TRUE

• FALSE

Tags

NGSS.HS-PS2-1

 

TRUE or FALSE:

A ball is thrown upwards, rises to its peak and eventually falls back to the original height. The speed at which it is launched equals the speed at which it lands. (Assume negligible air resistance.)

• TRUE

• FALSE

Tags

NGSS.HS-PS2-4

 

Two rocks with different size and mass are dropped from the same height. Which of the rock will reach the ground first?

• greater rock

• smaller rock

• both reach the ground at the same time

Tags

NGSS.HS-PS2-4

If an object is in free fall for 3 seconds, how fast will it be falling at the end of its motion?

• -9.8 m/s

• -19.6 m/s

• -29.4 m/s

• -39.2 m/s

Tags

NGSS.HS-PS2-1

A pumpkin is dropped from a 35 m building. What is its initial velocity, u?

• 9.8 m/s^2  

• 35 m

• 0 m/s

• 9.8 m/s

You drop your cell phone while in the bathroom in front of the mirror while the water is running in the sink below. If you are 0.45 meters above the sink, how long do you have before your cell phone is a gonner.

• 0.09s

• 0.03s

• 0.3s

• 0.9s

Tags

NGSS.HS-PS2-4