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
beks73 [17]
3 years ago
11

Guys I really need help with these 2 questions , it's for my final plz help asap

Physics
1 answer:
mars1129 [50]3 years ago
7 0

Answer:

(1) Initial speed, u=0

    Final speed, v=165.76m/s

    Average speed, v_a_v_g=82.87m/s

(2) Force of gravity, F_g=12.8\times10^1^5N

Explanation:

(1)

Given,

Distance, S=300meter

Time, t=3.62second

It is given that drag racer started at rest.

So Initial speed, u=0

Using Newton's second equation of motion,

S=ut+\frac{1}{2}at^2\\300=0+\frac{a\times3.62^2}{2} \\a=45.79m/s^2

Newton's first equation of motion,

v=u+at\\=0+45.79\times3.62\\=165.76 m/s

So, Final speed, v=165.76m/s

Average speed is defined as totle distance divided by totle time.

v_a_v_g=\frac{S}{t}\\=\frac{300}{3.62} \\=82.87m/s

So, Average speed, v_a_v_g=82.87m/s

(2)

Gravitation: It is the natural phenomenon in which two different bodies attract each other by virtue of their masses.

       According to Newton's law of gravitation, the force of attraction between two bodies is directly proportional to the masses of the bodies and inversely proportional to square of distance between centers of mass of the bodies.

                         F_g\propto\frac{m_1m_2}{r^2} \\F_g=G\frac{m_1m_2}{r^2}where Gis constant of proportionality and known as gravitation constant.

Given,

Mass of Jupiter, m_1=1.9\times10^2^7kg

Mass of Ganymede, m_2=1.48\times10^2^3kg

Distance between their centers of mass, r=1.21\times10^1^2meter

F_g=G\frac{m_1m_2}{r^2}\\=\frac{6.67\times10^-^1^1\times1.9\times10^2^7\times1.48\times10^2^3}{(1.21\times10^1^2)^2} \\=12.8\times10^1^5N

So, Force of gravity, F_g=12.8\times10^1^5N

You might be interested in
Pls answer it plssss
Sonbull [250]

Answer:

1.Stronger bones 2.Joint flexibility

3 0
3 years ago
After fixing a flat tire on a bicycle you give the wheel a spin. Its initial angular speed was 5.40 rad/s and it rotated 12.3 re
zaharov [31]

To solve this problem it is necessary to apply the concepts related to the kinematic equations of angular motion.

By definition, acceleration can be expressed as the change in angular velocity squared over a given period of distance traveled.

\alpha = \frac{\omega^2}{2\theta}

where,

\omega = Angular velocity

\theta = Angular displacement.

In turn, as a function of time, we can represent it as,

\alpha = \frac{\omega}{t}

For our case we have to,

\omega = 5.4rad/s

\theta = 12.3rev = 12.3rev(\frac{2\pi rad}{1rev})=24.6\pi rad

PART A) In the case of angular acceleration we have to,

\alpha = \frac{\omega^2}{2\theta}

\alpha = \frac{(5.4)^2}{2*24.6\pi}

\alpha = 0.1886rad/s^2

PART B) Through the definition of angular acceleration as a function of time we can calculate it,

\alpha = \frac{\omega}{t}

t = \frac{\omega}{\alpha}

t = \frac{5.4}{0.1886}

t = 28.63s

3 0
4 years ago
The magnet below is cut in half. what will be the result?
garik1379 [7]

Answer:

C.

Explanation:

This is what we call a permanent magnet. By the  way, the magnetic phenomena were first observed about 2500 years ago near the ancient city of Magnesia, what is today Manisa, located in western Turkey, when people saw fragments of magnetized iron. So what happens if you cut a magnet in half? Well, a magnet has two ends, the first one is called a north pole or N pole while the  other end is a south pole or S pole, so if you break a bar magnet, each piece  has a north and south pole, no matter the size of each new bar although the smaller the  piece, the weaker its magnetism. This is true because unlike electric charges, you always find magnetic poles  in pairs, that is, ¡they can't be isolated! The option is C. because in the great bar the north pole is to the left while the south pole is to right.

4 0
3 years ago
You tie a string to the ceiling and attach a weight to the end. You hold the weight next to your face but not touching it and th
Orlov [11]

Answer:

Depends on how long the string is, how heavy the weight, and how high you let go of it.

But it will most likely hit you :)

3 0
3 years ago
The energy that is released in a chemical reaction is _____________ the energy in the bonds of the reactants.
Rina8888 [55]
<em>the energy that is released in the chemical reactions is the exothermic energy ( stored ) in the bonds of reactants... :)</em>
6 0
4 years ago
Other questions:
  • Occupants in a single space shuttle in orbit feel weightless. describe a scheme whereby occupants in a pair of shuttles (or even
    11·1 answer
  • under what conditions would a scale record a weight for an object which is equal to the magnitude of the gravitational force on
    14·2 answers
  • 4. Jimmy dropped a 10 kg bowling ball from a building that is 25 meters high.
    9·1 answer
  • After the last ice age, stranded ice blocks left behind by the continental glacier melted and formed
    11·2 answers
  • A cinder block is sitting on a platform 20m high. It weighs 79N.
    10·1 answer
  • A shot-putter exerts an unbalanced force of 128 N on a shot giving it an acceleration of 19
    12·1 answer
  • PLEASE HELP WILL GIVE BRANLIEST IF CORRECT
    10·2 answers
  • A man walks 7 km East in 2 hours and then 2.5 km West in 1 hour. What is
    14·1 answer
  • आप शोर मत करिए। किस प्रकार का वाक्य है- *​
    11·1 answer
  • An astronaut leaves a spaceship that is moving through free space. Will the spaceship move off and leave the astronaut behind?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!