Answer:
Therefore the resistance of the air makes the movement not parabolic but shorter in each direction
Explanation:
The projectile motion is described by the kinematics equations giving a parabolic trajectory, where on the x axis there is no acceleration and on the y axis the acceleration is the acceleration of gravity.
When the air resistance is taken into account it can be approximated as a force that opposes the movement that for low speeds is proportional to the speed of the space.
Consequently, the movement in the axis and the acceleration is less, in some cases it can be so small that the constant handle speed, in this case, is called terminal velocity.
On the x-axis the friction force creates an acceleration in the negative direction of the movement that the projectile has to brake.
Therefore the resistance of the air makes the movement not parabolic but shorter in each direction.
 
        
             
        
        
        
Answer:
d=510.2m
t=10.2s
Explanation:
The formulas for accelerated motion are:

From them we can get  .
.
We have:

And substitute:

We multiply both sides by 2a, and continue:

Being d the displacement  , we have
, we have 
For our exercise, we will write this as:

And taking upwards direction positive and imposing final velocity 0m/s (for maximum height), we have:

For the time we use:

 
        
             
        
        
        
Latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature.
        
             
        
        
        
The frequency will not change
        
             
        
        
        
Answer:
20.62361 rad/s
489.81804 J
Explanation:
 = Initial moment of inertia = 9.3 kgm²
 = Initial moment of inertia = 9.3 kgm²
 = Final moment of inertia = 5.1 kgm²
 = Final moment of inertia = 5.1 kgm²
 = Initial angular speed = 1.8 rev/s
 = Initial angular speed = 1.8 rev/s
 = Final angular speed
 = Final angular speed
As the angular momentum of the system is conserved

The resulting angular speed of the platform is 20.62361 rad/s
Change in kinetic energy is given by

The change in kinetic energy of the system is 489.81804 J
As the work was done to move the weight in there was an increase in kinetic energy