Answer:
A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming. Modern computers have the ability to follow generalised sets of operations, called programs. These programs enable computers to perform an extremely wide range of task
Explanation:
(a) The total momentum of the system before the train cars collide is 1,600 kgm/s.
(b) The total momentum of the system be after the train cars collide is 1,600 kgm/s.
<h3>What is the total momentum of the car system before the collision?</h3>
The total momentum of the car system before the collision is determined by applying the formula for linear momentum.
Pi = m₁u₁ + m₂u₂
where;
- m₁ is the mass of the car on the right
- m₂ is the mass of the car on the left
- u₁ is the initial velocity of the right
- u₂ is the initial velocity of the car on the left
Let the rightward direction = positive
Let the leftward direction = negative
Pi = (600 kg x 4 m/s) + (400 kg) x (-2 m/s)
Pi = 2,400 kgm/s - 800 kgm/s
Pi = 1,600 kgm/s
Based on the law of conservation of linear momentum, the sum of the initial momentum of an isolated system is <u>equal</u> to the sum of the final momentum of the system
Pf = Pi = 1,600 kgm/s.
Learn more about conservation of linear momentum here: brainly.com/question/7538238
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Friction made it difficult because an object in motion may not always stay in motion due to the friction caused by its movement. For instance, if you roll a ball down a straight platform, it will not go on forever. The friction of the platform and the ball with eventually slow it down and stop it.
Hope this helps!!
Answer:
14.17545 m
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration due to gravity = 9.81 m/s²
The time the ball required to go up is half of the time the ball bounces straight up and returns to the floor. It is same for the ball going down.
![v=u+at\\\Rightarrow u=v-at\\\Rightarrow u=0-(-9.81)\times 1.7\\\Rightarrow u=16.677\ m/s](https://tex.z-dn.net/?f=v%3Du%2Bat%5C%5C%5CRightarrow%20u%3Dv-at%5C%5C%5CRightarrow%20u%3D0-%28-9.81%29%5Ctimes%201.7%5C%5C%5CRightarrow%20u%3D16.677%5C%20m%2Fs)
![s=ut+\frac{1}{2}at^2\\\Rightarrow s=16.677\times 1.7+\frac{1}{2}\times -9.81\times 1.7^2\\\Rightarrow s=14.17545\ m](https://tex.z-dn.net/?f=s%3Dut%2B%5Cfrac%7B1%7D%7B2%7Dat%5E2%5C%5C%5CRightarrow%20s%3D16.677%5Ctimes%201.7%2B%5Cfrac%7B1%7D%7B2%7D%5Ctimes%20-9.81%5Ctimes%201.7%5E2%5C%5C%5CRightarrow%20s%3D14.17545%5C%20m)
Maximum height of the ball is 14.17545 m
Explanation:
Hints:
Use the formula below to find the period.
![f = \frac{1}{t}](https://tex.z-dn.net/?f=f%20%3D%20%20%5Cfrac%7B1%7D%7Bt%7D%20)
Where f is the frequency in Hertz, and T is the time period in seconds.
To calculate the wavelength
use:
frequency=speed×wavelength
use the speed of sound. Make wavelength the subject of the formula and solve