A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2.0 s. How high is the building, assuming negligible air resistance

Answers

Answer 1

Answer:

Use one of the equations of motion under constant acceleration:-

s = ut + 0.5at^2 where s = distance, u - initial velocity, a = acceleration ( in this case it is gravity = 9.81 m s^-2) and t = time.

here we have s = 25*2 + 0.5*9.81 * 2^2

= 69.62 meters answer

Answer 2

Answer:

Answer: The height of the building is 69.6 m

Explanation:

To calculate the height of the building, we use second equation of motion:

$s=ut+(1)/(2)at^2$

where,

s = height of the building = ?

u = initial velocity of the ball = 25 m/s

a = acceleration due to gravity = $9.8m/s^2$

t = time taken = 2.0 sec

Putting values in above equation, we get:

$s=(25* 2.0)+(1)/(2)* 9.8* (2.0)^2\n\ns=69.6m$

Hence, the height of the building is 69.6 m

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Answers

Answer && Step-by-step explanation:

Obtain yards by multiplying miles by 1760

== 3520 yards

Pls help me thank you!!

Answers

Have you figured it out?

$(x)/(2) + 10 = * - 3$ The answer is 26, but I dont know how to solve it

Answers

First of all move all the Xs to the left side, and the numbers to the left.
So
x/2-x = -13
Which means
X/2-x/1 = -13
Which means x/2-2x/2 = -13
So u combine to two fractions
-x/2 = -13
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Alejando read 4 pages in a book in 6 minutes. How long would you expect him to read 6 pages at this rate

Answers

Answer:

So simple

4 pages = 6 min

1 page = 6/4 min

6 pages = 6 × 6/4

6 pages = 9 min

he would read 6 pages in 9 minutes

Help!!i will mark brainlyest!!

Answers

Answer:

Step-by-step explanation:

Square root of ten = 3.16227766

Simplified = 3.2

Answer:

Step-by-step explanation:

The square root of 10 is 3.16 something and the closest to that is q

A sample mean, sample size, and population standard deviation are given. Use the one-mean z-test to perform the required hypothesis test at the given significance level. Use the critical -value approach.= 20.5, n = 11 , σ = 7, H0: μ = 18.7; Ha: μ ≠ 18.7, α = 0.01