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BartSMP [9]
3 years ago
10

A free falling object eventually stops on reaching the ground. What happens to its potential energy?

Physics
1 answer:
Oliga [24]3 years ago
3 0

Answer:

When an object falls freely towards the ground, its potential energy decreases and kinetic energy increases. ... As the object touches the ground, all its potential energy gets converted into kinetic energy.

Explanation:

hope that helped

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20. A car battery with a 12-V emf and an internal resistance of 0.050 Ω is being charged with a current of 60 A. Note that in th
topjm [15]

Answer:

Part a)

V = 15 Volts

Part b)

P = 180 Watt

Part c)

Rate = 720 Watt

Explanation:

Part a)

When battery is in charging then the potential difference of the terminals of cell is given by

\Delta V = EMF + iR

here we know that

EMF = 12 volts

i = 60 A

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now we have

\Delta V = 12 + (0.050)(60) = 15 Volts

Part b)

Rate of thermal energy dissipated is the energy which is dissipating across the resistor

so here we have

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P = (60^2)(0.05)

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6 0
3 years ago
Name:
Brums [2.3K]

Answer:

1.a) 1 kJ

1.b) 4 kJ

     ratio 1:4

1.c) 4 times as before

2.a)  3.33 m/s2

Explanation:

1.a) bicycle's velocity =Displacement/time

                                   =100/20 m/s

                                   =5 m/s

bicycler's KE =1/2 *mass*(velocity)^2

                      =1/2*80*5^2

                       =1000 J = 1 kJ

1.b) bicycle's new velocity =200/20 m/s

                                   =10 m/s

bicycler's new KE =1/2*80*10^2

                             =4000 J = 4 kJ

Ratio= KE 1 :KE new

        = 1 :4

1.c)  when bicycler's speed was doubled it increased the KE by 4 times (2^2). because In KE we consider the square of the speed , so the factor we increase the speed , the KE will get increased with the square value of it

ex : speed is triple the prior value , then the KE is as 3^2 times as before. that is 9 times

2.a) car acceleration = (20-0)/6 m/s2

                                  = 3.33 m/s2

4 0
3 years ago
An electric pump has 2kW power . How much water will it lift every minute if the height is 10 m ?
valkas [14]

Answer:

Given that,

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Here, since the movement is vertical, w = mgh

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Power = mgh÷t

2000 = (m × 9.8 ×10) ÷ 60

m = (2000 ×60) ÷98

m = 1224.5kg

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Why do astronomers use spectroscopes to analyze light from distant objects?
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The force a magnet exerts on another magnet, on iron or a similar metal, or on moving charges is
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