1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Artist 52 [7]
3 years ago
15

A stone is thrown straight downward with a speed of 20 m/s from the top of a tall building. If the stone strikes the ground 3.0

seconds later, about how tall is the building?
A) 45m
B) 60m (wrong)
C) 90m
D) 105 m
Physics
1 answer:
Lady_Fox [76]3 years ago
6 0
Do you remember this formula for the distance traveled while accelerated ?

<u>Distance = (initial speed) x (t)  plus  (1/2) x (acceleration) x (t²)</u>

I think this is exactly what we need for this problem.

initial speed = 20 m/s down
acceleration = 9.81 m/s² down
t = 3.0 seconds

Distance down = (20) x (3)  plus  (1/2) x (9.81) x (3)²

Distance = (60)  plus  (4.905) x (9)

Distance = (60)  plus  (44.145)  =  104.145 meters

Choice  <em>D)</em>  is the closest one.
You might be interested in
If you have a yellow sheet of paper and shine a cyan light what color is the paper
Nuetrik [128]
Green would be the colour of the paper
4 0
4 years ago
Read 2 more answers
In the warm up, you reviewed the equation to calculate kinetic energy. What question could you ask about kinetic energy which wi
shutvik [7]

Explanation:

HEY PLS DON'T JOIN THE ZOOM CALL OF A PERSON WHO'S ID IS 825 338 1513 (I'M NOT SAYING THE PASSWORD) HE IS A CHILD PREDATOR AND A PERV. HE HAS LOTS OF ACCOUNTS ON BRAINLY BUT HIS ZOOM NAME IS MYSTERIOUS MEN.. HE ASKS FOR GIRLS TO SHOW THEIR BODIES AND -------- PLEASE REPORT HIM IF YOU SEE A QUESTION LIKE THAT. WE NEED TO TAKE HIM DOWN!!! PLS COPY AND PASTE THIS TO OTHER COMMENT SECTIONS!!

4 0
3 years ago
Read 2 more answers
Using Excel, or some other graphing software, plot the values of y as a function of x. (You will not submit this spreadsheet. Ho
Evgesh-ka [11]

Answer:

a) > x<-c(1,2,3,4,5)

> y<-c(1.9,3.5,3.7,5.1,6)

> linearmodel<-lm(y~x)

And the output is given by:

> linearmodel

Call:

lm(formula = y ~ x)

Coefficients:

(Intercept)            x  

      1.10         0.98  

b) y = 0.98 x +1.10

And if we compare this with the general model y = mx +b

We see that the slope is m= 0.98 and the intercept b = 1.10

Explanation:

Part a

For this case we have the following data:

x: 1,2,3,4,5

y: 1.9,3.5,3.7,5.1, 6

For this case we can use the following R code:

> x<-c(1,2,3,4,5)

> y<-c(1.9,3.5,3.7,5.1,6)

> linearmodel<-lm(y~x)

And the output is given by:

> linearmodel

Call:

lm(formula = y ~ x)

Coefficients:

(Intercept)            x  

      1.10         0.98  

Part b

For this case we have the following trend equation given:

y = 0.98 x +1.10

And if we compare this with the general model y = mx +b

We see that the slope is m= 0.98 and the intercept b = 1.10

7 0
3 years ago
the engine of a car of amass of 2000 kg produced a force of 15000N find the acceleration of the car​
weqwewe [10]
I believe the answer would be 7.5 m/s^2
3 0
3 years ago
Answer the question with step.​
Maru [420]

Answer:

f1/f2 =W1/W2 = 1/3

.0 f2 = 3f1

As ,

1/F= 1/f1 +1/f2

...1/40 = 1/f1 - 1/3f1

f1=> 80/3 cm

... f2 = 2f1 = 3 x 80/3 = 80 cm

7 0
3 years ago
Other questions:
  • Explain why a magnet sitting next to a wire does not induce a current in a wire
    12·1 answer
  • How did the southeastern United States drought affect the bottling operations of Pepsi and Coca-cola?
    14·1 answer
  • It takes a car 1.75h to go from mile marker 10 to mile marker 115. What is the average speed of the car
    14·2 answers
  • How many millimeter are there in 10 centimeters?
    15·2 answers
  • A ray diagram without the produced image is shown.
    5·1 answer
  • A billiard ball travels 23 cm in the positive direction , hits the cushion and rebounds in the negative direction , and Finally
    8·1 answer
  • A place where two plates slip past each other, moving in opposite directions, is known as a
    10·2 answers
  • oscillating spring mass systems can be used to experimentally determine an unknown mass without using a mass balance. a student
    12·1 answer
  • 15. If friction was completely removed from the track, what affect would this have on the roller coaster ride?
    14·1 answer
  • Name:
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!