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3 years ago

determinar el valor de la velocidad que lleva un cuerpo cuya masa es 3kg y su energia cinetica es de 400Joule

Physics

1 answer:

Korolek [52]3 years ago

6 0

Answer:

This is what they said in english if everyone was wondering

Explanation:

determine the value of the velocity carried by a body whose mass is 3kg and its kinetic energy is 400Joule

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Immediately after being struck by a hammer, the nail (mass of 50 g) has a velocity of 50 m/s. The total frictional force is 62.5

Marina86 [1]

Answer:

nail will stop after traveling 1000 m

Explanation:

We have given mass m = 50 gram = 0.05 kg

Frictional force which is used to stop the mass F = 62.5 kN

Initial velocity is given u = 50 m/sec

From newton's law force is equal to F = ma, here m is mass and a is acceleration

So $a=\frac{F}{m}=\frac{62.5\times 10^3}{0.05}=1.25\times 10^6m/sec^2$

As finally nail stops so final velocity v = 0 m/sec

From third equation of motion $v^2=u^2+2as$

So $0^2=50^2-2\times 1.25\times 10^6\times s$

s = 1000 m

So nail will stop after traveling 1000 m

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3 years ago

It takes 50 seconds for Tyler to do 450 Joules of work. How much power did Tyler use?

Tomtit [17]

Answer:

<h2>The answer is 9 W</h2>

Explanation:

The power used by an object can be found by using the formula

$p = \frac{w}{t} \\$

w is the workdone

t is time taken

From the question we have

$p = \frac{450}{50} = \frac{45}{5} \\$

We have the final answer as

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