Initial velocity u = 40
Angle at launch = 55 degrees
At maximum height v = 0, velocity equation v^2 = u^2 - 2gh,
0 = (40 x sin55)^2 - 2 x 9.81 x h => (40 x 0.819)^2 = 19.62h => h = 32.76^2 /
19.62
Maximum height = 54.7 m
We have v = u - gt => 0 = (40 x sin55) - 9.81 x t => t = 32.76 / 9.81 => t =
3.34 s
Time taken to hit the ground is 2t = 2 x 3.34 = 6.68 s
Distance from castle to trebuchet = utcos55 = 40 x 6.68 x 0.573 = 153.1 m
Answer: C
Explanation:
when more volts are in a battery the more current you receive.
Well first, how do we determine force?
The Avogadro’s number is used to represent the number of elementary entities that exist in one mole of a compound.
<h3>What is the Avogadro’s number?</h3>
The Avogadro’s number is used to represent the number of elementary entities that exist in one mole of a compound. The numerical value of the Avogadro’s number is obtained as 6.02 x 10^23 and consists of the atoms, molecules and ions in the compound.
The scientist Josef Loschmidt strengthened the Avogadro’s number by obtaining the number of particles in one cubic centimeter of gas under standard conditions.
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The distance covered is 8 blocks, the displacement is 2 blocks up
Explanation:
- Distance is a scalar quantity measuring the total length of the path covered by an object, regardless of the direction of its motion
- Displacement, on the other hand, is a vector quantity equal to the difference between the final position of motion and the initial position of motion. Its magnitude is equal to the shortest distance in a straight line between the initial and final point of motion.
In this problem, Kim walks the dog 5 blocks up and 3 blocks down:
- The distance is just the total length of the path taken, therefore:
- The displacement is a vector connecting the final point to the initial point. Since Kim walks 5 blocks up and 3 blocks down, her final position is
x = +5 +(-3) = +2
Which means, 2 blocks up. Therefore, the displacement is 2 blocks up.
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