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
nataly862011 [7]
3 years ago
11

A ball having a mass of 0.20 kilograms is placed at a height of 3.25 meters. If it is dropped from this height, what will be the

kinetic energy of the ball
when it reaches 1.5 meters above the ground?
A.1.2 joules
B.2.2 joules
c.3.4 joules
D.3.6 joules
E.4.3 joules
Physics
2 answers:
tatiyna3 years ago
8 0

Answer:

Kinetic energy, KE = 3.43 Joules

Explanation:

It is given that,

Mass of the ball, m = 0.2 kg

Initially, it is placed at a height of 2.25 meters. We need to find the kinetic energy of the ball  when it reaches 1.5 meters above the ground. It can be calculated using the conservation of energy.

To find,

Kinetic energy of the ball when it reaches 1.5 meters above the ground

KE=PE=mg(h_2-h_1)

KE=0.2\ kg\times 9.8\ m/s^2(3.25-1.5)\ m

KE = 3.43 Joules

So, the kinetic energy of the ball is 3.43 joules.

Phantasy [73]3 years ago
3 0

Answer:

3.4 Joules

Explanation:

the KE= 1/2 mv^2

By the equation v^2  = u^2  + 2as

where v is the final velocity

u is the initial velocity=0

a is the acceleration=-9.81

s is the displacement = 3.25-1.5=1.75(downwards)=-1.75

v^2= 2(-9.81)(-1.75)

v^2=34.335

KE: 1/2(0.2)(34.335)

=3.4335

=3.4 Joules( rounded to 1 decimal places)

You might be interested in
Use Newton’s Universal Law of Gravitation to calculate the magnitude of the gravitational force between a 200 kg refrigerator an
expeople1 [14]

Answer:

3.735×10⁻⁶ N

Explanation:

From newton' s law of universal gravitation,

F = Gmm'/r² .............................. Equation 1

Where F = Gravitational force between the person and the refrigerator, m = mass of the person, m' = mass of the refrigerator, r = distance between the person and the refrigerator. G = gravitational universal constant.

Given: m = 70 kg, m' = 200 kg, r = 0.5 m

Constant: G = 6.67×10⁻¹¹ Nm²/kg².

F = (6.67×10⁻¹¹×70×200)/0.5²

F = 93380×10⁻¹¹/0.25

F = 373520×10⁻¹¹

F = 3.735×10⁻⁶ N

Hence the force between the person and the refrigerator =  3.735×10⁻⁶ N

6 0
4 years ago
Sandra takes a class field trip to a geology museum. She sees an interesting sample of igneous rock. She wonders if the material
Aleonysh [2.5K]

Answer:

Yes

Explanation:

It is possible for sedimentary rocks to be converted to igneous rocks. Under conditions of high temperature and pressure, sedimentary rocks can be broken down into igneous rock by melting this rock type.

When the rock is broken down, it forms melt which when cooled and solidifies will form igneous rocks.

Sedimentary rocks are formed from the breaking down of pre-existing rocks through the action of weathering, erosion and sediment transportation. Within a basin, the sediments are compacted and lithified.

When this is subjected to intense pressure and temperature, the rock hardens and might further break down to melt.

6 0
3 years ago
Distinguish between friction force and motion?
Ksju [112]

Friction force is when you rub 2 things together and they get warm. Motion, on the other hand, is if your walking along the sidewalk - you hardly get warmer -------


Unless it's a colder day outside and you're walking SO you decide to rub your hands together to get warm, but if you were just walking , its motion and only motion - no friction :):)

6 0
3 years ago
What the name for the phenomenon of inducing voltage by changing the magnetic field around a conductor?
8090 [49]

The phenomenon of inducing voltage by changing the magnetic field around a conductor will be Electromagnetic Induction. Option B is correct.

<h3>What is the Faraday law of electromagnetic induction?</h3>

According to Faraday's law of electromagnetic induction, the rate of change of magnetic flux link with the coil is responsible for generating emf in the coil to result in the flow of amount of current .

So in order to increase the current, we need to increase the EMF;

so we can increase it by;

1) Increasing the number of turns

2) Increase the area of the loop

3) By moving the magnet faster

Hence, option B is correct.

To learn more about Faraday law of electromagnetic induction:

brainly.com/question/13369951

#SPJ1

8 0
2 years ago
Your science teacher gives you three liquids to pour into a jar. After pouring, the liquids layer as seen here. What property of
Blizzard [7]
A. mass
b. color
c. density
d. texture

i believe A
6 0
3 years ago
Read 2 more answers
Other questions:
  • How much work is required to lift an object with a mass of 5.0 kilograms to a height of 3.5 meters?
    15·2 answers
  • The charge of an electron is -1.60x10-19 C. A current of 1 A flows in a wire carried by electrons. How many electrons pass throu
    14·1 answer
  • True or false:slow movements of mantle rock called radiation transfer heat in the mantle.
    15·1 answer
  • A car driving at a constant speed of 64 mi/h travels 68 miles. How many hours did this take?
    15·1 answer
  • How does light interact with the surface of a rough stone?
    7·1 answer
  • Joe was asked to describe the movements the Earth makes as it rotates on its axis and revolves around the sur
    13·2 answers
  • What is the fundamental unit for measuring mass in the metric system ?
    15·2 answers
  • If you jumped out of a plane, you would begin speeding up as you fall downward. Eventually, due to wind resistance, your velocit
    13·1 answer
  • The diagram above shows the process of natural selection. What is X?
    12·2 answers
  • The container was lifted a height of 14 m
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!