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coldgirl [10]
3 years ago
12

A mass suspended on a spring will exhibit sinusoidal motion when it moves. If the mass on a spring is 85 cm off the ground at it

s highest position and 41 cm off the ground at its lowest position and takes 3.0 s to go from the top to the bottom and back again, determine an equation to model the data.
Physics
2 answers:
Ratling [72]3 years ago
8 0

Answer:

Using equation

y(t)=y0*Cos(wt)

w=2\pi/3

y0=85-41

y(t)=44cos(2\pi/3*t)

inysia [295]3 years ago
3 0

Answer:

The equation of motion is y(t)=22sin(\frac{2\pi }{3}t)

Explanation:

The general equation of motion of a SHM motion is given by

y(t)=Asin(\omega t+\phi )

where,

A is the amplitude of the motion

ω is the natural frequency of the system

Since amplitude is defines as the maximum displacement of the object from the mean position we have

2A=85 cm-41 cm\\\\A=\frac{44}{2}cm\\\\\therefore A=22cm

Now the time period is related to the natural angular frequency as

\omega =\frac{2\pi }{T}\\\\\therefore \omega=\frac{2\pi }{3}

Thus the equation of motion becomes

y(t)=22sin(\frac{2\pi }{3}t+\phi )

the initial phase can be assumed to be zero thus the equation becomes

y(t)=22sin(\frac{2\pi }{3}t)

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Answer:

m/s (meters per speed)

Explanation:

4 0
3 years ago
Object's velocity change
marshall27 [118]

the definition of acceleration in kinematics, allows to find that the correct answer is:

     2.  speed up  ( acceleration)

The kinematics study the movement of the body, the acceleration is defined as the change of the speed by the time in the interval

             a = Δv / t

Where the bold letters indicate vectors, a is the acceleration, v the velocity and t the time

Analyzing this expression we see that for there to be a change in velocity, there must be an acceleration of the body.

Let's analyze the different claims

1. True. If it is stopped and you start to move there is an acceleration, therefore there is a change in speed, but after you are moving the acceleration becomes zero and there is no change in speed

2. True. Whenever there is acceleration there is a change in speed

3. False. Moving slowly does not change the acceleration, therefore there is no change in speed

4. True. If you are moving and you stop at this moment there is an acceleration, therefore there is a change in speed, but after being stopped the acceleration is zero and there is no change in speed

5. False. If you change the direction at the instant of change there is an acceleration but after you go in the opposite direction there is not acceleration therefore there is no change in speed.

In conclusion using the definition of acceleration in kinematics, we can find the answer the condition for a change in velocity, the correct statement is:

     2.   speed up  ( acceleration)

Learn more here:  brainly.com/question/5063616

3 0
2 years ago
How much heat energy (in megajoules) is needed to convert 7 kg of ice at -9°C C to water at 0°C?
Molodets [167]

Answer:

hence option A is correct

Explanation:

heat required from -9°C to 0°C ice = mass × specific heat of ice ×change in temperature

heat required from -9°C to 0°C ice = 7×2100×9 =132300 J =0.1323 MJ

( HERE SPECIFIC HEAT OF ICE IS A CONSTANT VALUE OF 2100

J/(kg °C )

heat required from  0°C ice to 0°C water = mass× specific heat of fusion of ice

                                                             = 7×3.36×10^5

                                                              = 2.352 × 10^6 J

                                                              = 2.352 MJ

TOTAL HEAT ENERGY REQUIRED = 0.1323 MJ +2.352 MJ

                                                          = 2.4843 MJ

hence option A is correct

5 0
3 years ago
Which has more kinetic energy, a basketball rolling at a walking pace or a baseball rolling at the pace of someone running? How
icang [17]

Answer:

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8 0
3 years ago
What were some benefits to the american television from analog broadcast to digital broadcast?
Elanso [62]

Answer:

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Explanation:

nothing cause no

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3 years ago
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