1 year ago

Describe how a wheel and axle work?

Physics

1 answer:

andrezito [222]1 year ago

7 0

A weally works when you pull something and a axle is something that you can push

Explanation:

I hope this helps

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Why are collisions between galaxies more likely than collisions between stars within a galaxy?

KatRina [158]

Answer:

stars share a gravitational force with the galaxy while nearby galaxies do not share a gravitational field.

Explanation:

stars will not collide because they are bound by a gravitational orbit around the galaxy

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2 years ago

A horse of mass 242 kg pulls a cart of mass 224 kg. The acceleration of gravity is 9.8 m/s 2 . What is the largest acceleration

Rufina [12.5K]

To solve this problem it is necessary to apply the concepts related to Newton's second Law and the force of friction. According to Newton, the Force is defined as

F = ma

Where,

m= Mass

a = Acceleration

At the same time the frictional force can be defined as,

$F_f = \mu N$

Where,

$\mu =$ Frictional coefficient

N = Normal force (mass*gravity)

Our values are given as,

$m_h = 242 kg\\m_c = 224 kg\\\mu = 0.894\\$

By condition of Balance the friction force must be equal to the total net force, that is to say

$F_{net} = F_f$

$m_{total}a = \mu m_hg$

$(m_h+m_c)a = \mu*m_h*g$

Re-arrange to find acceleration,

$a= \frac{\mu*m_h*g}{(m_h+m_c)}$

$a = \frac{0.894*242*9.8}{(242+224)}$

$a = 4.54 m/s^2$

Therefore the acceleration the horse can give is $4.54m/s^2$

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2 years ago

Why is it necessary that all three thermometers were at approximately the same distance from the light bulb

iris [78.8K]

I'm assuming it was to keep the data consistent? The further you are from a heat source the less heat will get to you as the temperature tries to reach equilibrium and the waves start to spread out, so you should keep everything the same distance to get consistent results. I don't have any information so this is just my assumption

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2 years ago

6. A person lifts a package weighing 75 N. If she lifts it 1.2 m off the floor,

balandron [24]

Answer:

90 Joules

Explanation:

75×1.2=90.

i believe it is this

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2 years ago

If an automobile battery is rated at 20 ampere-hours, what is the maximum current that can be supplied for 19 minutes?

Elenna [48]

20Ah is the number of charge that can be supplied at 20A for 1 hour. If you wish to drain it in 19 minutes, then the current is:
$20*60 = A_{2}*19$
$A_{2}=63.2A$

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2 years ago