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2 years ago

Using your strategy to overcome your obstacle.

Physics

2 answers:

Rama09 [41]2 years ago

7 0

Answer:

Don’t complain. People don’t want to hear woe is me over and over again, especially if you do nothing about it. However, do ask for help and for suggestions from others that may have been in similar situations. You have to be willing to help yourself. People can’t do it for you.

Explanation:

USPshnik [31]2 years ago

6 0

Answer:

buena suerte con las citas del futuro

Explanation:

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3 years ago

Prove for N/C=Volt/m

Zigmanuir [339]

Answer:

simple, Volt =change in potential energy/Charge

the unit of energy is newton meter (Force*distance)

the unit of charge is coloumb

So, Volt/meter=newton* meter/coloumb*meter

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3 years ago

A 1.2 kg ball drops vertically onto a floor from a height of 32 m, and rebounds with an initial speed of 10 m/s.

iren [92.7K]

Explanation:

Given that,

Mass of the ball, m = 1.2 kg

Initial speed of the ball, u = 10 m/s

Height of the floor from ground, h = 32 m

(a) Let v is the final speed of the ball. It can be calculated using the conservation of energy as :

$\dfrac{1}{2}mv^2=mgh$

$v=\sqrt{2gh}$

$v=\sqrt{2\times 9.8\times 32}$

v = -25.04 m/s (negative as it rebounds)

The impulse acting on the ball is equal to the change in momentum. It can be calculated as :

$J=m(v-u)$

$J=1.2\times (-25.04-10)$

J = -42.048 kg-m/s

(b) Time of contact, t = 0.02 s

Let F is the average force on the floor from by the ball. Impulse acting on an object is given by :

$J=\dfrac{F}{t}$

$F=J\times t$

$F=42.048\times 0.02$

F = 0.8409 N

Hence, this is the required solution.

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3 years ago

If the velocity of a runner changes from -2 m/s to -4 m/s over a period of time, the

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Answer:

It will be A. So since its 2 times more the kinetic energy. But then you have to square it 2^2 = 4

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3 years ago

What name is given to the system that distributes electricity from power stations around the UK?

steposvetlana [31]

Answer:

The National Grid is the system operator of Great Britain's electricity and gas supply. This includes England, Scotland and Wales. It is the company that manages the network and distribution of electricity and gas that powers all our homes and businesses.

Explanation:

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2 years ago