3 years ago

FASTTT FOR BRAINLIST

Physics

1 answer:

telo118 [61]3 years ago

7 0

The answer should be A?

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In an arcade game a 0.135 kg disk is shot across a frictionless horizontal surface by compressing it against a spring and releas

ioda

Answer:

v=2.42m/s

Explanation:

We use the energy conservation theorem in order to solve the problem. The energy when the spring is compressed is equal at the energy when the disk leaves the spring:

$E_{initial}=E{final}\\E_{k-initial}+E_{p-initial}=E_{k-final}+E_{p-final}\\0+\frac{1}{2}kx^2=\frac{1}{2}mv^2+0$

At the beginning the initial energy is totally potential, energy linked to the compressed spring. At the end the energy is totally kinetics

We solve the equation in order to find the speed.

k=162 N/m

x=7 cm=0.07m

m=0.135 kg

$v=x*\sqrt{k/m}=0.07*\sqrt{162/0.135}=2.42m/s$

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3 years ago

What is the charge of an object that has lost 25 electrons?

Wewaii [24]

A negative charge i guess

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4 years ago

I will mark you Brainlient

Elina [12.6K]

Answer:

d.solid to liquid cause they were once on a fixed and started to slide.liquid particles slide along a container so it is a solid to liquid

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3 years ago

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Scientists have invented the equipment to harness the power of lighting for energy use. True or false

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I think it’s false .
Let me know if it’s incorrect .

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3 years ago