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4 years ago

A 50g man is walking at a speed of 4m/s. what is the kinetic energy of the walker?

1 answer:

4 0

We have: K.E. = 1/2 mv²
Here: m = 50 g = 0.05 Kg
v = 4 m/s

Substitute their values,
K.E. = 1/2 * 0.05 * 4²
K.E. = 1/2 * 0.05 * 16
K.E. = 0.4 J

In short, Your Answer would be 0.4 Joules

Hope this helps!

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3 years ago

What will happen for Potential energy of a body if the mass is dobled keeping height constant

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<h3>Given :-</h3>

The mass of the body is doubled
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<h3>Solution :- </h3>

We know that ,

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Therefore,

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According to the question,

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From (I) , we can conclude that, If mass of the body get doubled then its PE will also be doubled .

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3 years ago

The circuit shown is used to control the brightness of two identical lamps. The variable resistor is adjusted until the lamps op

tamaranim1 [39]

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3 years ago

Read 2 more answers

If an electron is accelerated from rest through a potential difference of 9.9 kV, what is its resulting speed? (e = 1.60 × 10-19

Nata [24]

Answer:

So speed of electron will be $5.89\times 10^{-7}m/sec$

Explanation:

We have given potential difference V = 9.9 KV

Charge on electron $e=1.6\times 10^{-19}$

So energy of electron $E=eV=1.6\times 10^{-19}\times 9.9\times 10^3=15.84\times 10^{-16}J$

This energy of electron will be equal to kinetic energy of electron

So $\frac{1}{2}mv^2=15.84\times 10^{-16}J$

$\frac{1}{2}\times 9.11\times 10^{-31}v^2=15.84\times 10^{-16}$

$v=5.89\times 10^{-7}m/sec$

So speed of electron will be $5.89\times 10^{-7}m/sec$

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3 years ago

Use the data provided to calculate the gravitational

nydimaria [60]

Answer:

3 kg: 14.7 kJ

6 kg: 29.4 kJ

9 kg: 44.1 kJ

Explanation:

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4 years ago