Free fall motion 5R

Item P and Q has different mass.

P=2Kg

Q=1Kg

which statement are true when item P and Q in free fall

• velocity of P and Q are the same

• The acceleration of P and Q are the same

• The momentum are the same

• inertia of P and Q are the same

Tags

NGSS.HS-PS2-2

Diagram show 2 item that expirience free fall in a vacuum

which physical quantity is constant?

• velocity

• acceleration

• momentum

• kinetic energy

A tennis dall is dropped from a roof 16 meter from the ground

How long does it take for the ball to reach the ground?

• 18 seconds

• 3.3 seconds

• -18 seconds

• 3.6 seconds

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A hotdog cannon shoots a hotdog straight up in the air with an initial velocity of 30 m/s.

how high will the hotdog fly?

• 46 m

• 1.5 m

• 4.6 m

• 15 m

Tags

NGSS.HS-PS2-1

While climbng a tree,you pick an apple and trow it straight down.After 1 second, the apple is traveling 18 m/s.

How fast will the apple be traveling 3 second later?

• -47 m/s

• 47

• 57

• -57

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A ball is trown upward in the air with an initial velocity of 40m/s.

how long does it take to reach back to the point it was trow from?

• 4 seconds

• 2 seconds

• 6 seconds

• 8 seconds

Tags

NGSS.HS-PS2-4

A ball is trown up in the air with an initial velocity of 40m/s.

what is the ball velocity after 2 seconds

• 0 m/s

• 20 m/s

• -20 m/s

• -40 m/s

Tags

NGSS.HS-PS2-1

A ball is trown up in the air wth an initial velocity of 40 m/s.

whar is the ball's velocity after 6 seconds?

• 20 m/s

• -19 m/s

• -20 m/s

• -30 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

whar is terminal velocity

• when object reach final velocity

• only happen in physical world

• it's not exist

• the constant speed that a freely falling object eventually reaches when the resistance of the medium through which it is falling prevents further acceleration.

Tags

NGSS.HS-PS2-1

when speed and direction remain the same throughout a motion, this is called?

• accelerated motion

• constant motion

• changing motion

• changing velocity