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3 years ago

Why do moving back and forth, and moving in a circle look the same on a graph of position versus time?

Physics

1 answer:

Tomtit [17]3 years ago

3 0

Answer:

Because in both kind of motions, the position is periodically repeated. Both are simple harmonic motions.

Explanation:

Moving back and forth means that the moving object goes through the same position every time a certain period of time elapses.

The same is true for the circular motion, every time the object completes a turn, the object is in the same position.

They are examples of simple harmonic motions. The time it takes the object to repeat a complete cycle is called period.

Therefore, in a grahp of position versus time, the curve that represents the position repeats itself every so often equal to one period, both for moving back and forth and for moving in a circle.

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you serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has how much energy

Len [333]

Answer:

In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.

8 0

2 years ago

Is mechanical energy conserved as a playground swing moves? Why or why not?

Lynna [10]

Answer:NO

Explanation:

No, because as it swings it is mechanical energy that changes from almost completely potential energy to almost completely kinetic energy and thermal and sound.

6 0

3 years ago

certain part of an aircraft engine has a volume of 2.2 ft3. (a) Find the weight of the piece when it is made of copper. (b) If t

Liono4ka [1.6K]

Answer:

(a) 54669.26 N

(b) 16473.996 N

Explanation:

(a)

From the question,

D = m/v................ Equation 1

Where m = mass of copper, D = density of copper, v = volume of copper.

make m the subject of the equation

m = D×v...............Equation 2

Given: v = 2.2 ft³ = (2.2×0.0283) m³ = 0.6226 m³

Constant: D = 8960 kg/m³

substitute into equation 2 above

m = 8960×0.6226

m = 5578.496 kg

W = mg

W = 5578.496×9.8

W = 54669.26 N

(b)

Also

Density= mass/volume.

D = m/v ............. Equation 3

Where D = density of aluminum, m = mass of aluminum, v = volume

make m the subject of the equation

m = D×v............. Equation 4

Given: v = 2.2 ft³ = 2.2×0.0283 = 0.6226 m³

Constant: D = 2700 kg/m³

Substitute into equation 4

m = 2700×0.6226

m = 1681.02 kg

But

W = mg

where W = weight, g = acceleration due to gravity

W = 1681.02×9.8

W = 16473.996 N

6 0

3 years ago

Read 2 more answers

((Helppp))if there are two equal forces being applied to an object of those two forces are in opposite directions what is it the

IgorLugansk [536]

Answer:

my answer personally is A

Explanation:

because their in opposite directions

7 0

3 years ago

Susan and Hannah are each riding a swing. Susan has a mass of 25 kilograms, and Hannah has a mass of 30 kilograms. Susan’s swing

Charra [1.4K]

Answer:

Kinetic energy is given by:

K.E. = 0.5 m v²

Susan has mass, m = 25 kg

Velocity with which Susan moves is, v = 10 m/s

Hannah has mass, m' = 30 kg

Velocity with which Hannah moves is, v' = 8.5 m/s

Kinetic energy of Susan:

0.5 m v² = 0.5 × 25 kg × (10 m/s)² = 1250 J

Kinetic energy of Hannah:

0.5 m v'² = 0.5 × 30 kg × (8.5 m/s)² = 1083.75 J

Susan's kinetic energy is 1250 J and Hannah's kinetic energy is 1083.75 J.

Since kinetic energy is dependent on mass and square of speed. Thus, speed has a greater effect than mass. As it is evident from the above example. Susan has greater kinetic energy due to higher speed than Hannah.

4 0

3 years ago