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3 years ago

Describe the work performed by a ski lift in terms of kinetic and gravitational potential energy

2 answers:

7 0

Explanation : When the lift falls, then the gravitational energy changed into the kinetic energy. Gravitational potential is associated with the mass of the lift and its position. When lift starts from rest , the mechanical energy of the lift change in the form of potential energy.

When the lift down than the potential energy lost and kinetic energy is gained. Lift loses height and gains speed.

The work is performed by the lift, when lift covers the distance against the gravitational force.

Whitepunk [10]3 years ago

7 0

In order to understand how kinetic and potential energy works in an ski lift it is necessary to know its terms

Potential energy is the energy that a body located from its height above the ground has

Kinetic energy is the energy of a body that is in motion

for the ski lift:

Kinetic Energy: When the ski lift moves from floor to floor

Potential Energy: When the ski lift is standing on the floor and people enter.

Gravitational energy: the chairlift uses the force of gravity to lower and change from potential energy to kinetic energy, with its own weight

I hope its help you

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PLEASE HELP!!!

anastassius [24]

Answer: 0 km/h

Explanation:
As a vector, the plane's velocity is 100 km/h (west) - 100 km/h (east) = 0 km/m.
To an observer on the ground, the plane will be standing still.

7 0

3 years ago

Who is the founder of operant conditioning?

Gemiola [76]

Operant conditioning, sometimes called <em>instrumental learning</em>, was first extensively studied by Edward L. Thorndike, who observed the behavior of cats trying to escape from home-made puzzle boxes.

Hope this helps!

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3 years ago

(answer it or get reported) Please answer it w the steps

Travka [436]

Answer;

The mass value for the above kinetic energy equation is 400.0000 kg. This is equal to:

■ 400,000.0000 g.

■ 14,109.6000 ounces.

■ 881.8480 pounds.

3 0

3 years ago

LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it. A typical LASIK laser emits a 1.

Fittoniya [83]

Answer:

143 kW

Explanation:

Given that

Diameter of the beam, d = 1 mm

Wavelength of the beam, λ = 193 nm

Time used by the pulse, t = 14 ns

Energy of the pulse, U = 2 mJ

Recall that Power can be mathematically calculated using the relation,

Power = Work Done / Time,

To solve this, we apply the formula

P = U / Δt

P = 2*10^-3 J / 14*10^-9 s

P = 142857 W

P = 143 kW

3 0

3 years ago

When a current of 0.015 A passes through human body at 240 volts p.d it<br><br>causes

geniusboy [140]

Explanation:

Given that,

Current, I = 0.015 A

Voltage, V = 240 volts

We need to find the resistance. Using Ohm's law we can find it as follows :

$V=IR\\\\R=\dfrac{V}{I}\\\\R=\dfrac{240}{0.015}\\\\R=16000\ \Omega$

So, When a current of 0.015 A passes through human body at 240 volts p.d it causes 16000 ohms of resistance.

3 0

3 years ago