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VashaNatasha [74]
3 years ago
9

Choose the correct reasoning of when a projectile reaches its highest point. A. A projectile reaches its highest point when its

vertical velocity component is undefined. B. A projectile reaches its highest point when its horizontal velocity component is zero. C. A projectile reaches its highest point when its vertical velocity component is
Mathematics
1 answer:
alexira [117]3 years ago
5 0

Answer: A projectile reaches its highest point when its vertical velocity component is zero.

Step-by-step explanation:

In projectile motion, objects moves in parabolic path.

Projectile motion is a type of motion in which an object moves in a bilaterally symmetrical, parabolic path. Projection motion happens when the force is applied at the start of the trajectory (where the object follows) which follows an interference which is gravity. Gravity takes over and afterwards the object accelerates downwards. The acceleration is constant so the vertical velocity (Vy) varies linearly. The maximum height of the projectile which is the highest height is reached when the vertical velocity (Vy) is equal to zero.

After the projectile reaches its maximum height which is its highest point, it begins to drop downwards.

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2 years ago
The width of a rectangle is 6 in. less than its length. The perimeter is 68 in.
erma4kov [3.2K]
2L + 2(L-6) = 68

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3 years ago
A publishing company claims that in fall 2019, the average price of college textbooks for a single semester is $385. Suppose you
hram777 [196]

Answer:

We accept H₀ . We don´t have enough evidence to express the publisher claim is not true

Step by Step explanation:

We must evaluate if the mean of the price of college textbooks is different from the value claimed by the publisher

n < 30 then we must use t - distrbution

degree of freedom   n  - 1     df = 22 - 1     df = 21

As the question mentions " different " that means,  a two-tail test

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and t(c)  = 2,831

Test Hypothesis

Null Hypothesis                      H₀          μ  =  μ₀

Alternative hypothesis           Hₐ          μ  ≠  μ₀

To calculate t(s)

t(s)  =  (  μ  -  μ₀ ) /σ/√n

t(s)  =  (  433,50 - 385 ) / 86,92 / √22

t(s)  =  2,6171

Comparing   t(c)   and t(s)

t(s) < t(c)

Then  t(s) is in the acceptance region we accept H₀. We don´t have enough evidence to claim that mean price differs from publisher claim

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3 years ago
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juin [17]

Answer: Mr. Parker can expect the trip to be at least 3 and a half hours

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Step-by-step explanation:

300 - 55 = 245

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3 years ago
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That are different because that are not!!!!! the same ?
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