Physics

Energy

Kinematics

The relationship is that mechanical energy is the sum of kinetic energy plus potential energy.

Think of a brick sitting on the edge of a table. The brick has potential energy proportional to the mass of the brick and the height of the table:

E = m g h where m = mass, g = gravitational acceleration, h = height

If the brick falls off the edge, it will begin to accelerate at g, the rate of gravitational acceleration (9.8 m/s2). If v is the velocity of the brick, it has kinetic energy proportional to the quare of the velocity:

E = (m v2)/2

Just before the brick finally hits the floor, all of its potential engergy has been converted to kinetic energy. During the moment of impact, that kinetic energy is converted to noise and vibration.

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Science

Physics

Algebra

Kinematics

Momentum is the product of mass and velocity, so just multiply both values

IF THE UNITS ARE APPROPRIATE.:

725 kg X 30 m/s = 21,750 kg-m/s.

(If the mass of the car were 725 slugs and it was moving at 30 miles per hour,

then you could not just multiply those numbers.)

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Physics

Energy

Kinematics

Assuming that no energy gets converted to/from other types of energy, only between potential and kinetic energy, then every time the potential energy goes up, the kinetic energy goes down - and vice versa. The exact details of HOW the graph goes up and down vary, depending on the situation, but the two curves are related as explained.

311312313

Math and Arithmetic

Physics

Kinematics

How To

D=vt+1/2(at^2)

Where

D=Distance

v=Initial Velocity

a=Acceleration

t=Time

Except we do not know the time t. Use v2 = u2 - 2aD. u is final velocity.

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Science

Kinematics

You would need 100 kg, or 980 N.

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Math and Arithmetic

Physics

Kinematics

Because impulse is the integral of the force over the time during which it was applied. Graphically, this is the area under the curve of force against time.

Force is rate of change of momentum. Even if you hit a brick wall you impart momentum to some of the atoms in it. The area under a graph of force against time is mathematically speaking the integral of the force with respect to time, as stated above. So it is the integral of the rate of change of momentum. But the integral of a rate of change of anything, is simply the total change. In this case, the total change of momentum. For a large force applied for a very small time, that is called (defined to be) an impulse, and it results in a change of momentum. Strictly it doesn't have to be a small time for this to be true, but impulses are generally imagined as being short time events.

303304305

Physics

Kinematics

km/s can be either a vector or a scalar quantity. It is a unit of speed, which is scalar, but if this speed is in a specific direction, thereby becoming velocity, it is vector.

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Math and Arithmetic

Physics

Kinematics

A straight line that coincides with the time axis, i.e., its value is zero at any time.

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Motorcycles

Units of Measure

Kinematics

ATVs

140 mph = 225.3 kph

281282283

Physics

Kinematics

Both depend on velocity; both depend on mass.

279280281

Kinematics

218 kph = 136.25mph

A body is moving at 218 kilometers per hour.

To find out how many miles will it move in the same amount of time, we will need to convert killometers into miles.

1 km = 1.6 miles

therefore 218 km = 218/1.6 miles = 136.25 miles.

279280281

Physics

Kinematics

DIY Projects

261262263

Math and Arithmetic

Physics

Kinematics

Potential energy is directly proportional to height.

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Physics

Chemistry

Kinematics

As temperature is increased the kinetic energy of the constituent particles of matter increases.When temperature decreases the kinetic energy of them decreases.

This is because temperature, or rather heat, is itself energy

267268269

Math and Arithmetic

Algebra

Kinematics

40 Miles per Hour = 58.666666666666664 Feet per Second

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Physics

Energy

Kinematics

There are flashlights where you push with your hand, and a dynamo produces an electrical current. In general, a dynamo can do what you ask for. But usually the proposition is not very practical. Where would you get the kinetic energy from?

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Physics

Kinematics

Comparisons

Elastic collison => Momentum and kinetic energy of colliding bodies are conserved.

Colliding bodies should be perfectly elastic and they regain their previous configuration after collison is over.

InElastic collison => Momentum is conserved but kinetic energy of colliding bodies are not conserved. Colliding bodies are not perfectly elastic. Their shape and size(configuration) changes after the collison.

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Physics

Energy

Kinematics

Motion and heat are the characteristics of energy.

253254255

Physics

Kinematics

A stationary frame of reference.

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Math and Arithmetic

Algebra

Kinematics

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Physics

Energy

Kinematics

Doubling of Kinetic Energy means, K.E. = 2 x 1/2mv2 = mv2.

So, if the velocity is doubled, then K.E. = 1/2m(2v)2 = 1/2 x 4mv2 = 2mv2 ,which means K.E. has increased 4 times .

207208209

Science

Chemistry

Kinematics

When the bus starts moving its potential energy will change to kinetic energy.

303132

Kinematics

That is potential energy. The energy of position. PE = mass * gravitational force * height. If the dam burst then the water would be moving and have kinetic energy.

200201202

Kinematics

Mach 0.925 = 314.76825 m / s OR 702 MPH

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