Answer:
The horizontal distance of the target should be 2721,4 meters.
Explanation:
First of all we need to find the time that the emergency package hits the ground after the moment of release:
y=0 (because when it hits the ground it is on the level of 0m);
![0=-4,9*t^2+3000\\t=24,74](https://tex.z-dn.net/?f=0%3D-4%2C9%2At%5E2%2B3000%5C%5Ct%3D24%2C74)
The emergency package hits the ground after 24,74 seconds from release.
Lets assume that package preserves his 110 m/s horizontal speed during the free fall. The targets horizontal distance is:
![110*24,74=2721,4](https://tex.z-dn.net/?f=110%2A24%2C74%3D2721%2C4)
2721,4 meters
Answer:
67.4 m/s
Explanation:
The force acting on the car, and that causes the car to slow down, is the force of friction, which is given by:
![F_f = -\mu mg](https://tex.z-dn.net/?f=F_f%20%3D%20-%5Cmu%20mg)
where
is the coefficient of kinetic friction
m is the mass of the car
is the acceleration of gravity
According to Newton's second law:
![F=ma](https://tex.z-dn.net/?f=F%3Dma)
where F is the net force on the car and a its acceleration. Comparing the two equations, we find an expression for the acceleration:
(1)
Since the motion of the car is a uniformly accelerated motion, we can use the following equation:
![v^2-u^2=2as](https://tex.z-dn.net/?f=v%5E2-u%5E2%3D2as)
where
v = 0 is the final velocity of the car
u is the initial velocity
a is the acceleration
s = 290 m is the distance covered by the car while slowing down
Using (1) and solving for u, we find the initial velocity:
![v^2-u^2 = -2\mu g s\\u=\sqrt{2\mu g s}=\sqrt{2(0.80)(9.8)(290)}=67.4 m/s](https://tex.z-dn.net/?f=v%5E2-u%5E2%20%3D%20-2%5Cmu%20g%20s%5C%5Cu%3D%5Csqrt%7B2%5Cmu%20g%20s%7D%3D%5Csqrt%7B2%280.80%29%289.8%29%28290%29%7D%3D67.4%20m%2Fs)
C. diffraction
Diffraction by description is occurrence
where the sound wave is interrupted or interacts with certain obstructions or
barriers. According to Huygens-Fresnel principle, it is where the waves are interfered
by said circumstances during its travel in the confined specific space.
Furthermore, the amount of
size the wavelength is directly proportional to its interacted slit or barrier
thus, these behaviors and amount are positively correlated.
Moreover, it occurs in a variety
of waves –may it be sound waves, water waves or electromagnetic waves.
The correct option is A. the isobaric process represented by the PV diagram
<h3>What is isobaric process?</h3>
- An Isobaric method is a thermodynamic revolution taking place at consistent pressure. The period isobaric has been derived from the Greek words “iso” and “baros” indicating equal intimidation.
- As such, the continued pressure is obtained when the importance is expanded or acquired. This basically neutralizes any pressure change due to the transfer of heat.
- In an isobaric procedure, when the heat is transferred to the system some work is done. Nevertheless, there is even a change in the internal energy of the system.
- This additionally means that no amounts as in the first law of thermodynamics evolve zero.
To learn more about isobaric process, refer to:
brainly.com/question/13040268
#SPJ9