A block initially at rest on a horizontal, frictionless surface is accelerated by a constant horizontal force of 5 newtons. if 15 joules of work is done on the bock by this force, the kinetic energy of the block increases by
Answers
Answer: The kinetic energy of the block increases by 15 Joules.
Explanation:
Work done is defined as the product of force and displacement of the object.
Mathematically,
where,
W =work done
F = force
s = Displacement
Kinetic energy is defined as the energy which is possessed by the virtue of object's motion.
In the question, it is given that work done on block is 15 Joules and we need to find the change in kinetic energy of the block.
We know that,
Work done on the object = Change in kinetic energy of the object
Thus, Kinetic energy is increased by 15 Joules.
The kinetic energy depends on the work done by the applied force. The kinetic energy of the block increases by 15 J.
What is kinetic energy?
The energy possessed by an object by its motion is known as the object's kinetic energy.
Given data-
The magnitude of the constant horizontal force is F = 5 N.
The work done on the block is, W = 15 J.
As per the work-energy theorem, the work done by the applied force is equal to the change in kinetic energy.
Then,
W = ΔKE
Solving as
15 = ΔKE
ΔKE = 15 J
Thus, we can conclude that the block's kinetic energy increases by 15 J.
Learn more about kinetic energy here:
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Answer: amplitude
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B. Negative
C. zero
Answers
Answer:
Positive
Explanation:
Answer:
positive
Explanation:
i'm reallt sorry if I'm wrong
Answers
When the circuit is fed with more than 50V, we want to add
another resistor in series with the 25-ohm lamp so that the
current through the combination will be 2A.
In order for 200V to cause 2A of current, the total resistance
must be 200V/2A = 100 ohms.
The lamp provides 25 ohms, so we want to add another 75 ohms
in series with the lamp. Then the total resistance of the circuit is
(75 + 25) = 100 ohms, and the current is 200V/100 ohms = 2 Amps.
The power delivered by the 200V mains is (200V) x (2A) = 400 watts.
The lamp dissipates ( I² · R ) = (2² · 25 ohms) = 100 watts.
The extra resistor dissipates ( I² · R) = (2² · 75 ohms) = 300 watts.
Together, they add up to the 400 watts delivered by the mains.
CAUTION:
300 watts is an awful lot of power for a resistor to dissipate !
Those little striped jobbies can't do it.
It has to be a special 'power resistor'.
300 watts is even an unusually big power resistor.
If this story actually happened, it would be cheaper, easier,
and safer to get three more of the same kind of lamp, and
connect THOSE in series for 100 ohms. Then at least the
power would all be going to provide some light, and not just
wasted to heat the room with a big moose resistor that's too
hot to touch.
b. lamp
c. resistor
d. ammeter
Answers
In a battery we can able to find the voltage gain.
The following information should be considered;
- Since the battery is treated as the active device.
- But the lamp, resistor, ammeter are considered to be the passive devices that result to the potential drops instead of the voltage gain.
Learn more: brainly.com/question/1691136?referrer=searchResults
Answer:
A
Explanation:
b. The shadow cast by a rock that's stuck on the edge of a spinning wheel.
c. A car driving from San Diego to Los Angeles.
d. An ant walking at a steady pace from the tip of a propeller toward the hub.
e. None of these settings.
Answers
Answer:
option b is correct.
Explanation:
Since the position as a function of time is given by
which is a periodic function thus the motion of the particle repeats after a time of 2 seconds thus among the given options only option b is case of repetitive motion thus option b is most appropriate since the spinning wheel repeates it's motion.
Answers
a note higher than middle c has the greatest frequency. Hence option D is correct.
What is Wave ?
Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.
Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform. There are two types of the wave longitudinal wave and transverse wave.
Hence option D is correct.
To know more about frequency :
#SPJ2.
Answer:
a note higher than middle c
Explanation: