<span>mechanical energy is E=mgh+ 1/2 mV²=2*9.8*1+1/2*2*4.4²=38.96J,
the only force is P, that is a conservative force so the answer is
</span>mechanical energy is conserved and its value is <span>38.96J, </span>
Velocity (unit:m/s) of the wave is given with the formula:
v=f∧,
where f is the frequency which tells us how many waves are passing a point per second (unit: Hz) and ∧ is the wavelength, which tells us the length of those waves in metres (unit:m)
f=1/T , where T is the period of the wave.
In our case: f=1/3
∧=v/f=24m/s/1/3=24*3=72m
The vertical height of the given plane is 4.9 m.
The given parameters:
- <em>speed of the object at the bottom of the ramp, v = 9.8 m/s</em>
The vertical height of the plane is calculated by applying principle of conservation of mechanical energy as follows;

Thus, the vertical height of the given plane is 4.9 m.
Learn more about conservation of mechanical energy here: brainly.com/question/332163
Answer:3.67 s
Explanation:
Given
Ball is thrown with an initial velocity of 
As the ball moves upward it experience a declaration due to gravity which will slow down the ball
using

where v=final velocity
u=initial velocity
a=acceleration
t=time
Here 


