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What is Newton’s first law

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2 answers:

san4es73 [151]3 years ago

8 0

An object remain at the state of rest or motion unless acted by an external force.

amid [387]3 years ago

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Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.

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A friction force of 280 N exists between a cart and the path. If the force of reaction is 766 N, what is the minimum action forc

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force of friction on the cart is given as

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here we also know the reaction force due to surface

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so we can say reaction force is given as

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$766 = \sqrt{F_n^2 + 280^2}$

$F_n^2 = 766^2 - 280^2$

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now by force balance we will say

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$F_f = \mu * F_n$

$280 = \mu * 713$

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now minimum force required to set this into motion

$F_{min} = \frac{\mu mg}{\sqrt{1 + \mu^2}}$

here we know that

$mg = F_n = 713 N$

$F_{min} = \frac{0.39* 713}{\sqrt{1 + 0.39^2}}$

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So it will require 259 N minimum force to move it

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