3 years ago

3. Imagine a 10kg block moving with a speed of 20m/s calculate the kinetic energy of this block

1 answer:

6 0

The formula of the kinetic energy is:
$E_{k} = \frac{m v^{2} }{2}$
where m is a mass of the object, v is speed of the object at the moment of time. So we have:
$E_{k} = \frac{10* 20^{2} }{2} = 2000J$
The answer is 2000 Joules.

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d1i1m1o1n [39]

Answer:

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Explanation:

It is given by,

Initial velocity of the person, u = 0

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We need to find the net force acting on the kayak i.e.

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$v^2-u^2=2as$

$a=\dfrac{v^2-u^2}{2s}$

$a=\dfrac{(0.68\ m/s)^2-0}{2\times 0.428\ m}$

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Put the value of a in equation (1) as :

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So, the net force acting on the kayak is 44.66 N. Hence, this is the required solution.

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Answer:

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a = -1.6 m/s²

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Find:

v² = v₀² + 2a(x - x₀)

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x = 2.775 m

Rounded to 3 sig-figs, the astronaut halloweener reaches a maximum height of 2.78 meters.

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Answer:

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