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Alik [6]
3 years ago
11

Suppose you increase your walking speed from 7 m/s to 15 m/s in a period of 3 s. What is your acceleration?

Physics
1 answer:
lisov135 [29]3 years ago
7 0

You asked the question twice I answered it on the last one

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When a person jumps from tree to ground, what happens to the momentum of the person upon striking the ground? ...?
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When a person jumps from a tree to ground, what happens to the momentum of the person upon striking the ground is that it is transferred to earth. The momentum is not lost, it is conserved by being transferred to the ground. But it can also be lost to the impulse. 
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Why does the light from the touch reach upto only certain distance
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A car of mass 1000 kg is travelling at 10 m/s. What is its kinetic energy?
Marysya12 [62]

Answer:

50,000

Explanation:

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2 years ago
A battery powers a circuit for a small noisy fan. The fan’s motor gets warm as it turns. What energy transformations are taking
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Answer:

The battery is an electric energy source, which is being used to power a motor. The motor turns this electricity into kinetic energy as it spins the fan, creates heat from friction, and creates noise as stated by the problem.

Explanation:

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2 years ago
Read 2 more answers
A 0.75μF capacitor is charged to 70 V . It is then connected in series with a 55Ω resistor and a 140 Ω resistor and allowed to d
Ipatiy [6.2K]

Answer:

Explanation:

Capacitor of 0.75μF, charged to 70V and connect in series with 55Ω and 140 Ω to discharge.

Energy dissipates in 55Ω resistor is given by V²/R

Since the 55ohms and 140ohms l discharge the capacitor fully, the voltage will be zero volts and this voltage will be shared by the resistor in ratio.

So for 55ohms, using voltage divider rule

V=R1/(R1+R2) ×Vt

V=55/(55+140) ×70

V=19.74Volts is across the 55ohms resistor.

Then, energy loss will be

E=V²/R

E=19.74²/55

E=7.09J

7.09J of heat is dissipated by the 55ohms resistor

6 0
3 years ago
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