Answer:
a) V = 6.25 m/s
b) d = 4.6 m
Explanation:
a) <u>The pelican's initial speed is equal to the horizontal speed of the fish</u>. So we can calculate Vx of the fish knowing the fact that it travelled 8.0 m, using the formula for an <em>Uniformly Accelerated Motion</em> (because the fish is freefalling) to calculate the time the fish was falling:
D(t) = 0.5*a*t² + V₀*t + e₀
In this case, V₀ and e₀ are zero, a is gravity's acceleration and D(t) is 8.0 m
8.0 m = 0.5 * 9.81m/s² * t²
t² = 1.63 s²
t = 1.28 s
Thus Vx of the fish is:
8.0 m / 1.28 s = 6.25 m/s
<u>And that's the same initial speed of the pelican.</u>
b) The pelican is traveling at the same speed, so Vx of the fish remains the same, 6.25 m/s. First we calculate the time again:
D(t) = 0.5*a*t²
2.7 m = 0.5 * 9.81m/s² * t²
t² = 0.55 s²
t = 0.74 s
Now we use the formula V = d/t and solve for t:
6.25 m/s = d / 0.74 s
d = 4.6m
Answer:
V = 44.4 units.
Explanation:
In order to solve this problem, we must use the Pythagorean theorem. Which is defined by the following expression.
where:
Vx = - 43 units
Vy = 11.1 units
Now replacing:
Infrared radiation<span> lies between the </span>visible<span> and microwave portions of the electromagnetic spectrum. Infrared waves have wavelengths longer </span>than visible<span> and shorter </span>than<span> microwaves, and have </span>frequencies<span> which are lower </span>than visible<span> and </span>higher than<span> microwaves.</span>
The velocity of B after elastic collision is 3.45m/s
This type of collision is an elastic collision and we can use a formula to solve this problem.
<h3>Elastic Collision</h3>
The data given are;
- m1 = 281kg
- u1 = 2.82m/s
- m2 = 209kg
- u2 = -1.72m/s
- v1 = ?
Let's substitute the values into the equation.
From the calculation above, the final velocity of the car B after elastic collision is 3.45m/s.
Learn more about elastic collision here;
brainly.com/question/7694106
