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2 years ago

What is the unit of a force, and what is 1 unit equivalent to?

Physics

1 answer:

Verizon [17]2 years ago

6 0

Answer:

Newton

Explanation:

The unit of force is Newton and it is given after Sir Isaac Newton for his tremendous works in this regard.

Force is the product of mass and acceleration of a body.

Force = mass x acceleration

The unit of mass = kg

acceleration = m/s²

So;

1N = 1kgm/s²

Therefore, the unit of force is newtons and 1N is equal to 1kgm/s²

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A crane used 250,000 Joules of work to move a beam to the top of a building in 20 seconds. How much power did the crane use?

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alexandr402 [8]

Answer:

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A rock is thrown horizontally from a high building at 33.8 m/s. What is the magnitude of its velocity 4.25 s later?

Alex17521 [72]

<h2>Answer:53.63 $ms^{-2}$ </h2>

Explanation:

The equations of motion used in this question is $v=u+at$

When a object is projected horizontally from a sufficiently height,the x-component of acceleration remains zero because there is no force that drags the object in x direction.

But,due to gravity,the object accelerates downward at a rate of $9.8ms^{-2}$ .

In X-Direction,

Given that initial velocity= $u_{x}$ = $33.8ms^{-1}$

Using $v=u+at$ ,

$v_{x}=33.8+(0)4.25=33.8ms^{-1}$

In Y-Direction,

Given that initial velocity= $u_{x}$ = $0ms^{-1}$

Using $v=u+at$ ,

$v_{y}=0+(9.8)4.25=41.65ms^{-1}$

$v=\sqrt{v_{x}^{2}+v_{y}^{2}}$

$v=\sqrt{1142.44+1734.72}=\sqrt{2877.163}=53.63ms^{-1}$

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2 years ago