a 1.0-kg ball is thrown into the air with an initial velocity of 30. m/s. a. how much kinetic energy does the ball have? b. how much potential energy does the ball have when it reaches the top of its ascent? c. how high into the air did the ball travel?
Answers
a) Kinetic energy of ball is 450J.
A 1kg ball is thrown into the air with an initial velocity of 30m/s. Newtonian physics says thekinetic energy that the ball have is:
( ×1 kg×
= 450 J.
In physics, what is kinetic energy?
The energy a thing has as a result of motion is known as kinetic energy. A force must be applied to a thing in order to accelerate it. We must put forth effort in order to apply a force. After the job is finished, energy is transferred to the thing, which then moves at a new, constant speed.
b) Potential energy of ball is 450J
The whole amount of energy will be in the form of potential energy since the ball's kinetic energy will be equal to zero. As a result, when the ball reaches the peak of its climb, its potential energy will be 450 J.
c) 45m high into the air ball travel.
KE at start = GPE at the peak
450 = mgh
450 = (1)(g)(h)
450= (1)(10)(h)
45=h
Therefore, the ball will reach up to a height of 45m.
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Related Questions
A parallel-plate capacitor with only air between the plates is charged by connecting it to a battery. The capacitor is then disconnected from the battery, without any of the charge leaving the plates.(a) A voltmeter reads 45.0 V when placed across the capacitor. When a dielectric is inserted between the plates, completely filling the space, the voltmeter reads 11.5 V. What is the dielectric constant of this material?(b) What will the voltmeter read if the dielectric is now pulled partway out so it fills only one-third of the space between the plates?
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Water _____. 1 has a pH value of 0 2 dissolves in most substances 3 is made of helium and oxygen 4 becomes less dense when it freezes
Which of the following is not a dwarf planet?A. Hydra B. Haumea C. Eris D. Pluto
gas
liquid
solid
Answers
Answer
Liquid
Explanation
There are four states of matter. Gas, liquids, plasma and solids.
Solids has a definite shape.
Gas and plasma has no definite volume.
Liquids are made up of very small vibrating particles called molecules that are held together by intermolecular forces. This makes the liquid to have a definite volume and no definite shape.
liquid
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Since DNA analysis take a huge amount of money , the FBI only test the suspect whom they almost 100% sure is the suspect.
But according to researches, about 10 % of the 'matches' in the physical characteristic of hairs were contradicted by the DNA analysis
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During multiple fussion amitosis occure so there are many divisions of nucleus of unicellular parent organism.
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gravity dwn, your hand up and equal to grav
Final answer:
When you hold a book at rest, two forces act upon it: the downward gravitational force exerted by the Earth represented as -14ĵ N and the upward force exerted by your hand that equals 14 N, balancing out the weight of the book. These forces cancel each other out, keeping the book at rest as per Newton's Second Law.
Explanation:
When you hold a book at rest in your hand, two primary forces are acting upon it. These are the gravitational force, which is the book's weight pulling it downwards, and the force exerted by your hand, pushing upwards against the book. The downward gravitational force is caused by the earth's mass attracting the book's mass. This force is represented as -14ĵ N in physics. The force exerted by your hand counters this gravitational pull, allowing the book to remain at rest in your hand.
By Newton's second law, since the book is at rest, the net force acting on the book is zero. Meaning, the gravitational force and the force exerted by your hand cancel each other out. This is represented as: FPH + FEH = 0, where FPH is the force exerted by your hand and FEH is the force exerted by the Earth. With proper calculation, the force exerted by your hand on the book equals 14 N in the upward direction, counteracting the book's weight.
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Answers
To find the mass of the block of ice, we can use the equation:
Weight = Mass × Acceleration due to gravity
In this case, the weight of the block of ice is given as 520 Newtons. The acceleration due to gravity on Earth is approximately 9.8 m/s².
So, let's plug in the given values into the equation:
520 N = Mass × 9.8 m/s²
To solve for mass, we can rearrange the equation:
Mass = Weight ÷ Acceleration due to gravity
Mass = 520 N ÷ 9.8 m/s²
Calculating this gives us:
Mass ≈ 53 kg
Therefore, the correct answer is C. 53 kg.
Final answer:
The mass of a block of ice that weighs 520 Newtons on Earth is 53 kg.
Therefore, the answer is option c
Explanation:
The weight of an object can be calculated using the formula weight = mass x acceleration due to gravity. In this case, the weight of the block of ice on Earth is given as 520 Newtons. We can use the formula to solve for mass by rearranging it to solve for mass: mass = weight/acceleration due to gravity. Assuming the acceleration due to gravity on Earth is 9.8 m/s², we can calculate the mass as follows:
mass = 520 N / 9.8 m/s² = 53 kg
Therefore, the mass of the block of ice is 53 kg.
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The wavelength of the sound increases.
The frequency of the sound increases.
The wave speed of the sound increases.
Answers
The answer is that the sound is increased because the sound waves are mechanical waves, this means that they can't travel trough empty space they need a medium to travel.
Answer:
The sound is silenced.
Explanation:
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