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
vekshin1
3 years ago
9

A rock is thrown straight up with an initial velocity of of 24.9m/s^2 . what maximum height will the rock reach before starting

to fall downward?
Physics
1 answer:
Over [174]3 years ago
6 0

Answer:

maximum height = 31.63 m

Explanation:

Please notice that the units of velocity that you were giving are incorrect. They should be m/s. The ones given in the problem are in fact units of acceleration (not velocity). I am assuming that the initial velocity of the rock is 24.9 m/s to solve this problem.

Let's start by finding the time it takes the rock to reach that maximum height at which point, the velocity of the rock will be zero (just before changing its direction of movement and starting heading down.

We can use the fact that the initial velocity (v_i) of the rock is 24.9 m/s, the final velocity (v_f) at the maximum height is zero, and that the only acceleration it is getting is that of gravity (g) slowing down it motion:

v_f-v_i=-g\,*\,t\\0-24.9=-9.8\,*\,t\\t=\frac{-24.9}{-9.8} \\t=2.54\,s

Now we can use this time it takes the rock to reach the maximum height, in the kinematic expression for the distance covered:

y_f-y_i=v_i\,*\,t-\frac{1}{2} \,g\,*\,t^2\\y_f-y_i=24.9\,(2.54)-\frac{1}{2} \,9.8\,*\,(2.54)^2\\y_f-y_i=31.63\,m

The units of height will come directly in meters (m) after evaluating, since we use all the quantities in the SI system.

You might be interested in
A net force of 60 N north acts on an object with a mass of 30 kg. Use Newton's second law of motion to calculate the amount of a
choli [55]
<h3 /><h3>Answers :</h3><h3 />

F = m×a

60 N = 30 kg × a

30 × a = 60

a =  60/30

a =  2 m/s²

<h3 /><h3 />

<em>The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. </em>

<em></em>

Explanation:

If the net force increases while the mass of the object remains the same, the amount of acceleration also increases.

However, when the mass of the object increases while the net force remains the same, the amount of acceleration decreases.  

<h3 />

4 0
3 years ago
What are the two ways to determine the negative leg of an LED?
ziro4ka [17]
There are three main ways to find which end is positive and negative on LED.  First there is occasionally on the base of the LED<span> a flat part which you would use to identify that as the negative end. Second way is to look at the length of the ends occasionally they will both be the same size, but most of the time the negative end will be shorter. And finally, LED the electrodes of the negative one is the larger of the two. </span>
6 0
3 years ago
Please help me!<br>each form of a characteristic is called what?
jeka94
I think the answer is Allele am not so sure of it and sorry if my answer is wrong or didn’t help okay
6 0
3 years ago
Read 2 more answers
In cats, short hair is dominant and long hair is recessive. If a cat has the genotype of hh, what type of hair will it have?
raketka [301]

Answer:

long hair

Explanation:

long hair = hh

short hair= HH

and medium= Hh

8 0
3 years ago
#86 can an object be moving when its acceleration is zero? can an object be accelerating when its speed is zero?
liraira [26]
Yes, an object<span> that was set in motion in the past by some force, but that is no longer being acted on by a net force, is </span>moving<span> but with </span>zero acceleration<span>, i.e. it is </span>moving<span> at constant velocity.</span>
7 0
3 years ago
Other questions:
  • What is the difference in the charges on a balloon rubbed in your hair and a glass rod rubbed with Silk? Why?
    5·1 answer
  • A car, on a straight road, is stopped at a traffic light. When the light turns to green the car accelerates with a constant acce
    11·1 answer
  • What is produced when calcium reacts with fluorine in a synthesis reaction
    10·2 answers
  • Measure if how far an object has moved.
    15·1 answer
  • What is the average velocity of a rocket that travels 15 m in 0.25 seconds?​
    9·1 answer
  • The particles of a more dense substance are closer together
    14·2 answers
  • On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 2.50 times as far as he wo
    13·1 answer
  • What happens to an object when an unbalanced force acts on it?
    11·1 answer
  • PLEASE ANSWER ASAP!
    15·1 answer
  • A boy is swinging a yo-yo with mass 0.5 kg in a circle with radius 0.7 m at a
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!