Answer:
Approximately
, assuming that 
Explanation:
The weight of the elevator is:
.
Since the speed of the elevator is constant, the acceleration of this elevator would be
.
By Newton's Second Law of Motion, the net force on the elevator (proportional to acceleration) would also be
. All external forces on the elevator need to be balanced in every direction.
The only two vertical forces on the elevator are:
- the weight of the elevator (downward gravitational pull from the earth,) and
- the upward pull from the motor.
These two forces need to balance one another. Since the weight of the elevator is approximately
, the upward pull of the motor would be
. in magnitude.
The direction of this upward pull is the same as the direction of the motion of this elevator. Thus, the work that the motor did on the elevator would be positive:
.
Since the velocity of the elevator is constant, instantaneous power output of the motor would be equal to the average power of the motor:
.
It meant that Its not easy to process the thought of an action into the mind.
Balance tubes by spacing them equally around the centrifuge and Always balance tubes with other tubes containing a same volume of liquid are right.
If you don't space them out equally, you will have a lot of broken glass to clean up...trust me. The same thing can happen if you don't have equal amounts of liquid in each tube, but it doesn't have to be exactly the same in every one.
Answer:
80 ft/s
Explanation:
Given:
Δy = 100 ft
v₀ = 0 ft/s
a = 32.2 ft/s²
Find: v
v² = v₀² + 2aΔx
v² = (0 ft/s)² + 2 (32.2 ft/s²) (100 ft)
v = 80.2 ft/s
Rounded, the speed when it reaches the ground is 80 ft/s.