Physics High School

1. A baseball that has been thrown is travelling at 40m/s. If
the ball has a mass of 0.142kg, how much kinetic energy
does it have?
2. If a similar baseball was hit and travelled at 52m/s and
had 196J of kinetic energy, what is the mass of that
baseball?
3. A 4kg shot put is thrown and it has 288J of kinetic energy.
What is the mass of the shot put?

Answers

Answer 1

Answer:

See explanations below

Explanation:

1) KE = 1/2mv²

mass m = 0.142kg

v = 40m/s

KE = 1/2 * 0.142 * 40^2

KE = 1/2 * 0.142 * 1600

KE = 800*0.142

KE = 113.6Joules

2) KE = 1/mv^2

KE = 196

mass m = ?

velocity v = 52m/s

Substitute

196 = 1/2*m*52²

196 = 1352m

m = 196/1352

m = 0.145kg

Hence the mass of the baseball is 0.145kg

3) KE = 1/2mV^2

288 = 1/2 * 4v²

288 = 2v²\

v² = 288/2

v² = 144

v = 12m/s

The velocity of the shotput is 12m/s

Related Questions

The musical tone a piano has a frequency of 346HZ and a wavelength of 1.3 M what is the speed of the sound

Answers

Answer:

v= 449.8 m/s

Explanation:

Given data

Frequency=  346Hz

Wave length= 1.4m

The expression below is used to find the speed

[tex]v= f \lambda\\\\[/tex]

substitute

[tex]v= 346*1.3\\\\v= 449.8 m/s[/tex]

Hence the speed is v= 449.8 m/s

WILL GIVE BRAINLIEST

Answers

The first, fourth, and fifth answers are correct.

The photo shows a toy spring. What kind of energy does the toy have because of its shape?

Answers

Answer:

elastic

Explanation:

if you stretch it it will go back to its shape, and also it is the only one that makes sense.

Answer:

Elastic

Explanation:

I got it right

Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional questions. Online Content: Site 1 Online Content: Site 2 How is coal formed and why is it considered a nonrenewable resource? (Site 1)

Answers

Answer:

Coal is fossil fuel extracted from earth and since it takes a long time to replenish, it is called a non renewable source of energy

Explanation:

Coal is formed from the fossil fuel that lie deep beneath the earth crust . These fossil fuels are dead remains of living organism that burried beneath the earth crust million of years ago.

Coal is non renewable because if once it gets depleted it will take a very very long time to replenish.

Answer: Coal is fossil fuel extracted from earth and since it takes a long time to replenish, it is called a non renewable source of energy

Explanation: just did it


2. Which of the following wavelength properties would require a stopwatch to measure?
A wavelength
B amplitud
C frequency
D height

Answers

Answer:

A. wavelength

Explanation:

The others are about sound and how high it is. That has nothing to do with time.

Question : Which of the following wavelength properties would require a stopwatch to measure ?

A - wavelength

B- amplitude

C- frequency

D- height

MY ANSWER : C- FREQUENCY

MWAHHH LOVE - HAVE A RESTFUL NIGHT !

1. Hearing is also known as
?

Answers

I’m not sure what your quite asking for, but some people say auditory perception instead of hearing

ILL GIVE BRAINLYyYYYyYYyyyyy
The best thermal insulators _____________________.


have free electrons.


are metals.


conduct heat well.


are gases.

Answers

Answer:

The best thermal insulators have free electrons

A- Lunar Eclipse

B- Neap Tide

C- Spring tide

D-Solar tide

Answers

A) Lunar eclipse babe

D Solar tide

Explanation:

Because d is closer to the sun

Isotopes _____ at very different rates.

Answers

Answer:

i think its decay?

Explanation:

The specific heat capacity of copper is 390 J/Kg AC. What does this
mean?

Answers

Answer:

It means that 400 J of heat is the required amount to raise or lower thh temperature of a 1kg piece of copper

Explanation:

390 J/Kg °C specific heat capacity of copper means, 390 J of energy is required to raise the temperature of 1 kg of copper by 1 °C

From the given information,

The specific heat capacity of copper is 390 J/Kg °C. To determine what this means, we will define the term specific heat capacity.

The specific heat capacity of a substance is the amount of energy required to raise the temperature of 1 kg of the substance by 1 °C.

Therefore, 390 J/Kg °C specific heat capacity of copper means, 390 J of energy is required to raise the temperature of 1 kg of copper by 1 °C.

Hence, 390 J/Kg °C specific heat capacity of copper means, 390 J of energy is required to raise the temperature of 1 kg of copper by 1 °C.

Learn more here: https://brainly.com/question/20879870

Find the force on an object which has a mass of 20 kg and an acceleration of 10 m/s2.

Answers

Answer:

200N

Explanation:

mass = 20 kg

acceleration = 10 m/s^2

Force = mass * acceleration

         = 20 *10

         = 200 N

if you already have the time which is 4s and the initial velocity which is 9.8m/s and the acceleration which is -9.8m/s/s. what would the dispacement be?​

Answers

Answer:10

Explanation:

2+2=10

Answer:

10

Explanation:

2+8=10

6+4=10

5+5=10

7+3=10

9+1=10

3+2+4+1=10

Help please

Which occurrence would lead you to conclude that lights are connected in a
combined circuit?
A. When one bulb burns out all the lights go out.
B. When one bulb burns out, a circuit breaker is tripped.
C. When one bulb burns out a small section of lights goes out.
D. When one bulb burns out all the other lights stay lit.

Answers

Answer:

D

Explanation:

as one burns then all stop simple

please mark me as brainlist

The speed of a wave is 70 m/s. If the wavelength of the wave is 0.4
meters, what is the frequency of the wave?

Answers

Answer:

dont know still in 7gd

Explanation:

Answer:

Leo no i dont ansver

Explanation:

ezgisu0613062011 http ()/_

calculate the power used by a 40kg man if he climbs a 6m tall ladder in 15 seconds​

Answers

Answer:

(i)

Force of gravity acting on the boy = mg

= 40 * 10

= 400 N

(ii)

Work done by him = mgh

= 40 * 10 * 0.08

= 32 J

(iii)

Power = Work / Time

= 32 / 5

= 6.4 Watt

Explanation:

hope this helps

How can circular motion be accelerated when speed is constant?
A. Because of the accelerator pedal in the vehicle
B. Because Newton said
C. Because direction changes
D. Because the vehicle has circular wheels

Answers

Answer:

Correct answer is C: Because direction changes.

Explanation:

Hope you have a wonderful weekend.

1. What do the elements Sulfur (S), Nitrogen (N), Phosphorous (P), and Bromine (Br) all have in
common?

Answers

I have no idea just getting points

What equations would you use to find force?

Answers

Answer:

F = m x a

Explanation:

F = force

m = mass of an object

a = acceleration

What type of system would allow light to enter and exit, but would keep any
additional atoms out?

Answers

An isolated system , it does not allow any matter or energy to be exchanged

Answer: it’s closed

Explanation: a pex

Two examples of inventions that increase friction?

Answers

Answer:

My hard pp...............

Explanation:

Substance A has twice the specific heat capacity as substance B. If 1000 J of heat are added to 1.0 kg of each substance, compare the change in temperature of each substance.

Answers

Substance A would have a delta T (change in temp) rise 1/2 the rise in substance B.

Q=mc x delta T

Q= heat energy in Joules
m= mass of substance heated or cooled
c= specific heat
ΔT is change in temp.

Solve for change in temp=. Q/mc

Specific heat and mass are not inversely proportional to heat energy input.

Putting into real world scenario of using water to heat a building.

Specific heat of water is 1.
It takes 1 btu to raise one pound of water 1 degF. at a base of 60 degF

Acetone specific heat is .51

So it takes half the amount of heat input to get a 100 degree ΔT, as compared to water.

3. Explain what the law of conservation of momen-
tum means, and give example.

Answers

Answer:

The law of momentum means

Explanation:

Definition of reflection(in Integrated Science

Answers

Reflection, abrupt change in the direction of propagation of a wave that strikes the boundary between different mediums. At least part of the oncoming wave disturbance remains in the same medium. Regular reflection, which follows a simple law, occurs at plane boundaries.

a ball of mass 1kg is being suspended 10m above the ground & is then dropped. what is the balls kinetic energy just before it hits that ground ?

a. 10 J
b. 98 J
c. 50 J
d. 0 J

Answers

Answer:

E = 98 J

Explanation:

Given that,

The mass of a ball, m = 1 kg

It is being suspended 10m above the ground & is then dropped.

We need to find the ball's kinetic energy just before it hits that ground. The conservation of energy holds here. It means, the kinetic energy just before it hits that ground is equal to its potential energy i.e.

[tex]E=mgh\\\\E=1\times 10\times 9.8\\\\E=98\ J[/tex]

so, the required energy is 98 J. Hence, the correct option is (b) "98 J".


40 Newtons
30 Newtons
20 Newtons
10 Newtons
Which statement is TRUE about the picture above?
A
The spheres have only weight but no mass.
B
The 40 Newton sphere has the greatest gravitational force.
The smaller the weight, the greater the gravitational force
D
Although the weights of the spheres are different, the gravitational forces
are the same
Sign out
04:04

Answers

Although the weight of the spears a different the gravitational forces are the same

What are the two forces that are acting on the skydiver? What is
the relationship between these two forces? Explain.

Answers

Answer:

Gravity provides a downward force, resulting in the diver going downward. They speed up like any falling object would, the pull of gravity is a dominant force. (There is a drag force – as a result of moving through the air.)

which of the following terms or pair of terms is used to describe how energy flows in a chemical reaction?
A.Conservation of matter
B.Chemical Equation
C.Reactants and products
D.Exothermic and Endothermic

Answers

Answer:

D    Exothermic and Endothermic

Explanation:

Answer:

D

Explanation:

I just took test

PLEASE HURRYYYy THIS IS DUE IN 5 minutes!!!!!!
Find the momentum of a 3.0kg mass when it is stopped.

Answers

Answer:

there is no momentum

Explanation:

Human sense impressions are subjective and qualitative
making them difficult to record or compare.
TRUE
FALSE

Answers

Answer:trueee

Explanation:

3. Which of the following has more inertia?
b. Hammer
DI
Feather

Answers

Answer:

The Feather.

Explanation:

Inertia depends on the mass of an object.

B because the hammer
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