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
erica [24]
3 years ago
7

A ball is thrown vertically upward at 24.0 ms can reach a height of 28.8m ( neglecting air resistance).The speed,in m/s,when it

is halfway to its highest point is (using g= 10 ms ^2)
Physics
1 answer:
ICE Princess25 [194]3 years ago
3 0

Answer:

The answer is "16.79\ \frac{m}{s}"

Explanation:

In this question, the halfway indicates the height that is \frac{28.8}{2}=14.4 \ m

Using formula:

v^2=u^2+2as\\\\v^2=24^2+2(-10)(14.4)\\\\

v^2=576-288\\\\v^2=288\\\\v=\sqrt{288}\\\\v=16.97 \ \frac{m}{s}

You might be interested in
An object moving 20 m/s
yan [13]

Answer:

<u>We are given:</u>

initial velocity (u) = 20m/s

acceleration (a) = 4 m/s²

time (t) = 8 seconds

displacement (s) = s m

<u />

<u>Solving for Displacement:</u>

From the seconds equation of motion:

s = ut + 1/2 * at²

replacing the variables

s = 20(8) + 1/2 * (4)*(8)*(8)

s = 160 + 128

s = 288 m

7 0
3 years ago
A rifle fires a 2.01 10-2-kg pellet straight upward, because the pellet rests on a compressed spring that is released when the t
Zina [86]

Answer:

The value of spring constant is 266.01 \frac{N}{m}

Explanation:

Given:

Mass of pellet m = 2.01 \times 10^{-2} kg

Height difference of pellet rise h_{f} - h_{o} = 6.03 m

Spring compression x = 9.45 \times 10^{-2} m

From energy conservation law,

Spring potential energy is stored into potential energy,

  mg(h_{f} -h_{o})  = \frac{1}{2} kx^{2}

Where k = spring constant, g = 9.8 \frac{m}{s^{2} }

  k = \frac{2mg(h_{f} -h_{o} )}{x^{2} }

  k = \frac{2 \times 9.8 \times 6.03\times 2.01 \times 10^{-2} }{(9.45\times 10^{-2} )^{2} }

  k = 266.01 \frac{N}{m}

Therefore, the value of spring constant is 266.01 \frac{N}{m}

6 0
3 years ago
Which of the following in NOT an ionic compound?<br><br> NaBr<br> MgCl2<br> O SCI2<br> K (NO3)
Nonamiya [84]
It’s could be O SCI2
4 0
2 years ago
In the fusion reaction occurring in the Sun, how does the mass of helium atom formed compare to the mass of the hydrogen atoms?
PolarNik [594]
B bc there is a lot of hydrogen used

3 0
3 years ago
A horizontal spring with spring constant 950 N/m is attached to a wall. An athlete presses against the free end of the spring, c
OLga [1]

Answer:

66.5N

Explanation:

F = kx

Where F = force

K = spring constant

x = compression

Given

K = 950N/m

x = 7.0cm

F = ?

First convert the compression to meters .

7.0cm = 7.0 x 0.01

= 0.07 meters

Therefore

F = 950 x 0.07

= 66.5N

4 0
3 years ago
Other questions:
  • Is nuclear fission hybrid physics or geothermal phsics
    15·2 answers
  • What is the definition of work in Physics?
    8·1 answer
  • What is the angle of reflection
    14·2 answers
  • The law of _________ states that energy is not truly produced, but really only manipulated from one form to another.
    8·1 answer
  • SOMEBODY PLEASE HELP!! 20 PTS!!!
    13·2 answers
  • A physics major is cooking breakfast when he notices that the frictional force between the steel spatula and the Teflon frying p
    12·1 answer
  • A 5000 kg truck runs into a 0.5 kg mosquito. Which of the following should not be the same for both?
    11·1 answer
  • Two homogeneous bodies of the same volume
    7·1 answer
  • I need the answer quick I’ll mark u as brainlist!
    13·1 answer
  • An asteroid is discovered in a nearly circular orbit around the Sun, with an orbital radius that is 3.570 times Earth's. What is
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!