แผ่นงานUnit 3.5 Free Fall
คำถามทั้งหมด: 17
The standard acceleration due to gravity (or standard acceleration of free fall),is the nominal gravitational acceleration of an object in a vacuum near the surface of the Earth. It is defined by standard as:
9.8 m/s.
9.8 m.
9.8 m/s2.
9.8 s.
Which one falls faster in vacuum? An elephant or a leaf?
Elephant
Leaf
They are the same
Nothing can be said
As a rock in FREE FALL falls through the air, acceleration
stays constant
decreases until it hits terminal velocity
increases until it hits terminal velocity
increases ~10 m/s each second
Heavier objects free fall faster than lighter objects.
True
False
A rock is dropped into a deep well and a splash is heard 3.00 seconds later. (Assume it takes negligible time for the sound to travel up the well.) What is the velocity time graph for this scenario?
On a planet that has no atmosphere, a rocket 14.2 m tall is resting on its launch pad. Freefall acceleration on the planet is - 4.45 m/s/s. A ball is dropped from the top of the rocket with zero initial velocity. What is the velocity time graph for this scenario?
While skydiving, your parachute opens and you slow from 50.0m/s to 8.0m/s is a mere 0.80sec. What is the velocity time graph for this scenario?
After landing safely from your skydiving experience you are so excited that you throw your helmet straight up. It reaches a height of 5.0m above your hand. What is the velocity time graph for this scenario?
When a parachute canopy is opened more drag is created because:
It has a large mass
It has a large surface area
It is travelling at terminal speed
The person is now vertical
According to Galileo's observations gravity pulls on all objects equally regardless of _____________
size
shape
mass
time of day
When the air resistance or drag is equal and opposite to the weight of the object you would call this
terminal velocity
gravitational weight
flux capacitor
rotational inertia
What is the acceleration of a ball that is dropped off the side of a cliff after 1,2,3,4,5 seconds? (assume g is rounded to 10 m/s2)
5,10,15, 20, 25 m/s2
10, 20, 30, 40, 50 m/s2
5, 20, 45, 80, 125 m/s2
10,10,10,10,10 m/s2
What is the vertical velocity of a ball that has been dropped off a cliff after 1 , 2, 3, 4, and 5 seconds? (assume g is rounded to 10 m/s2)?.
10, 20, 30, 40, 50 m/s
5, 10, 15, 20, 25 m/s
5, 20, 45, 80,125 m
10,10,10,10,10 m/s
When speed and direction remain the same throughout motion, this is called?
Accelerated motion
Constant motion
Changing motion
Changing velocity
If you throw a baseball straight up, what is its vertical velocity at the highest point?
9.8 m/s2
9.8 m/s
0 m/s2
0 m/s
แป้นคำตอบUnit 3.5 Free Fall
คำถามทั้งหมด: 17
9.8 m/s2.
They are the same
increases until it hits terminal velocity
False
It has a large surface area
mass
terminal velocity
10,10,10,10,10 m/s2
10, 20, 30, 40, 50 m/s
Constant motion
0 m/s