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
Misha Larkins [42]
3 years ago
8

A kid throws a pencil straight up at

Physics
2 answers:
Alexandra [31]3 years ago
4 0

Answer:

Explanation:

The boy throw the pencil upward at a speed of 6.33 m/s

Then,

Initial velocity of throw is 6.33 m/s

u = 6.33 m/s.

Time to reach a maximum height of 1.25m

h = 1.25m

Note: at maximum height, the final velocity is zero

v = 0m/s

Acceleration due to gravity is

g = 9.81m/s²

We want to calculate time to reach maximum height

t = ?

Then, applying equation of motion

v = u + gt

But since it is against gravity, then, g is negaive

Then,

v = u - gt

0 = 6.33 - 9.81t

-6.33 = -9.81t

Then,

t = -6.33 / -9.81

t = 0.645 seconds

AlladinOne [14]3 years ago
4 0

Answer:

The time you use the pencil to reach the ceiling is 0.6459 s

Explanation:

Given:

v = speed = 6.33 m/s

h = high = 1.25 m

g = gravity = 9.8 m/s²

Question: How much time does it take for the pencil to reach the ceiling, t = ?

The equation for calculate the time is:

v_{y} =v_{initial} +gt

In this case vinitial = 0, since the pencil comes out of his hand. Solving for t:

t=\frac{v_{y} }{g} =\frac{6.33}{9.8} =0.6459s

You might be interested in
A peregrine falcon dives at a pigeon. The falcon starts downward from rest with free-fall acceleration. If the pigeon is 56.0 m
goldenfox [79]

 

The solution would be like this for this specific problem:

 

<span>v = ? </span><span>
<span>u = 0.0 m/s </span>
<span>a = 9.8 m/s^2 </span>
<span>s = 56.1 m </span></span>

<span>v^2 = (0.0 m/s)^2 + [2 * (9.8 m/s^2) * (56 m) ] </span><span>
<span>v^2 = 2 * (9.8 m/s^2) * (56 m) </span>
<span>v^2 = 1,097.6 m^2/s^2 </span>
<span>v = SQRT {1,097.6 m^2/s^2 } </span></span>

v = 33.1 m/s

<span>v = u + at </span>

<span>(v - u) / a = t </span>

[ (33.1 m/s) - (0.0 m/s) ] / (9.8 m/s^2) = 3.38 seconds

If the pigeon is 56.0 m below the initial position of the falcon, it will take 3.38 seconds for the falcon to reach the pigeon. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

4 0
2 years ago
Read 2 more answers
15. A car travelling towards the right has a mass of 1332 kg and has a speed of 25 m/s. A truck is
swat32

Explanation:

Given that,

The mass of a car, m₁ = 1332 kg

The speed of the car, u₁ = 25 m/s (right)

The mass of a truck, m₂ = 3000 kg

The speed of the truck, u₂ = -15 m/s

The total momentum after the crash is given by :

p=m₁u₁ + m₂u₂

Put all the values,

P = 1332(25) + 3000(-15)

= −11700 kg-m/s

So, the total momentum after the crash is equal to 11700 kg-m/s and it is in the left direction.

5 0
2 years ago
________ can occur when an analog connection creates an electromagnetic field around its conductors, inducing its waveforms on a
KatRina [158]

Answer:

Crosstalk

Explanation:

The answer is Crosstalk as this phenomenon is most commonly associated with analog phone call.

Now, crosstalk is defined as a disturbance caused by the electric or magnetic fields of one telecommunication signal which affects a signal in an adjacent circuit. In a telephone circuit, crosstalk could result in hearing part of a voice conversation from another circuit. Hence, the phenomenon that causes crosstalk is called electromagnetic interference (EMI). This may occur in microcircuits within computers and audio equipments including within network circuits. This term is also usually applied to optical signals that interfere with each other.

6 0
2 years ago
(PLEASE HELP THANK YOU) A car is going 8 meters per second on an access road into a highway and then accelerates at 1.8 meters p
jonny [76]

Answer:

20.96 m/s

Explanation:

Apply the kinematic equation:

Vf=Vi+at

Vi=8m/s

a=1.8m/s^2

t=7.2s

Putting this all in should give you your answer of 12.96m/s

6 0
3 years ago
F an object has a mass of 200 kg and a weight of 1000 N, what is g?
jeka94

Answer:

g = 5 m/s square

Explanation:

Weight(W), Mass(m), Gravity(g)

W = mg

1,000N = 200g

g = 1000/200

g = 5 m/s square

7 0
2 years ago
Other questions:
  • Which expression represents the total net force on the block? A) 20N + 10N B) 20N x 10N C) 10N + -20N D) 12N 10N
    6·2 answers
  • The first modern atomic scientist was:
    6·2 answers
  • Which of the following scenarios is possible for the resultant velocity of an airplane in a strong wind to be 150 m/s?
    9·1 answer
  • A person would have a different weight on each planet. Arrange the planets in increasing order based on a person’s weight on the
    10·2 answers
  • Starting from Joe's Gas Station, a car travels due north on Avenue A for 2.4 mi, then turns right and travels on Cedar Street fo
    12·1 answer
  • What is net displacement vector? I just started AP Physics 1.
    9·2 answers
  • From the edge of a cliff, a 0.46 kg projectile is launched with an initial kinetic energy of 1430 J. The projectile's maximum up
    15·1 answer
  • The environment between the outer and inner nuclear membranes is most accurately referred to as the:
    11·1 answer
  • PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (30pts)
    15·1 answer
  • The plates on a vacuum capacitor have a radius of 3.0 mm and are separated by a distance of 1.5 mm. What is the capacitance of t
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!