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
Ulleksa [173]
3 years ago
8

a ball is thrown vertically upward with an initial speed of 40 m/s. how high is the ball above the ground when it stops

Physics
2 answers:
NISA [10]3 years ago
5 0

Answer:

80m, assuming g=10m/s^2

Explanation:

40m/s will be reduced to 0m/s in 4 seconds. 4 seconds x 40m/s would be 160m up, but you will only get half of that because you decelerate linearly to 0m/s. This leaves you with 4 x 20 = 80m.

jok3333 [9.3K]3 years ago
3 0

Answer:

80m

Explanation:

According to the equation of motion, v²= u²+2as

Where v is the final velocity of the body at maximum height= 0m/s

u is the initial velocity of the body = 40m/s

a = -g (negative acceleration due to gravity since the object is thrown upward) = -10m/s²

S = H = the height of the ball above the ground

Substituting the values into the equation given, we will have;

0² = 40²-2(10)H

0 = 1600-20H

-1600 = -20H

H = -1600/-20

H = 80m

The height of the ball above the ground where it stops will be 80m

You might be interested in
When dropping a grape and a bowling ball from a height, the force of gravity would be identical on each object. True or False
AVprozaik [17]

Answer:

I think true but im not sure sorry if this didnt help/

Explanation:

7 0
3 years ago
Read 2 more answers
Your neighbor is riding her bike around the block. When she slows down and turns a corner, what changes about her?.
Ann [662]

Answer:

nothing

Explanation:If you ride a bike around the block and return to the exact point where you started, your displacement is zero.

By definition, displacement involves changing an object from its original position. No matter how far or for how long a body moves, if it returns to the position it started from, it has not been displaced at all. This means that the body has zero displacements.

4 0
2 years ago
The speed of light in vacuum is exactly 299,792,458 m/s. A beam of light has a wavelength of 651 nm in vacuum. This light propag
sukhopar [10]

Answer:

v=2.58\times10^8m/s

Explanation:

The index of refraction is equal to the speed of light c in vacuum divided by its speed v in a substance, or n=\frac{c}{v}. For our case we want to use v=\frac{c}{n}, which for our values is equal to:

v=\frac{c}{n}=\frac{299792458m/s}{1.16}=258441774.138m/s

Which we will express with 3 significant figures (since a product or quotient must contain the same number of significant figures as the measurement with the  <em>least</em> number of significant figures):

v=2.58\times10^8m/s

4 0
3 years ago
A cylindrical bucket, open at the top, is 28.0 cm high and 11.0 cm in diameter. A circular hole with a cross-sectional area 1.55
svlad2 [7]

Answer:

so height is 0.1283 m

Explanation:

given data

height = 28 cm

diameter = 11 cm

cross-sectional area = 1.55 cm2

water flow rate  =  2.46×10^−4 m3/s

to find out

How high will the water in the bucket rise

solution

we know that here

potential energy = kinetic energy

mgh = 1/2 mv²

multiply both sides by the 2 and we get

2mgh=mv²

solve it we get

√(2gh) = v    ....................1

h = v²/2g   ...............2

and

flow rate = A V

2.46×10^−4 = V 1.55×10^−4

V = 1.5870 m/s

so from 2

h = v²/2g

h = 1.5870²/ 2(9.81)

h = 0.1283 m

so height is 0.1283 m

6 0
4 years ago
If a statue is made out of wood, which of these words correctly describes the statue?
bonufazy [111]

Answer:

Od- Wooden

Explanation:

It would not make sense if it was non-wood because that make it no a wood base product, OC is not right because its not a a plant that produces wood as its structural tissue and thus has a hard stem.   An OA justT o take or get a supply of wood. so its Od

5 0
2 years ago
Other questions:
  • Which of the following solid fuels has the highest heating value
    12·1 answer
  • If your weight is 120 pounds and your mass is 54 kilograms how would those values change if you were on the moon
    5·1 answer
  • How is an electric current carried?
    6·1 answer
  • A researcher measured the absorbance and percent transmittance of a blue dye at wavelengths between 425 and 700 nmnm. The measur
    7·1 answer
  • Which spacecraft did john glenn pilot when he became the first man to orbit the earth in 1962?
    12·1 answer
  • What is a measure of the pulling force of gravity?
    15·1 answer
  • HELP MEEEE NO LINKS
    11·2 answers
  • two cars go through 2 different crashes. car one 1 experiences a 500N impulse for a duration for 15s, while car2 experiences the
    11·1 answer
  • Stars have different colors. What causes stars to have colors?
    11·2 answers
  • Wolfgang pauli hypothesized an exclusion principle. This principle says two electrons in an atom cannot have the same what?.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!