3 years ago

Brainliest if correct Question 10 of 10

Physics

1 answer:

elena-s [515]3 years ago

6 0

Answer: I think it is b or a.

Explanation: Hope this help please mark me as brainlyist

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A force of 7.0 N acts on a block of wood at an angle of 50 degrees above the horizontal as the block moves a distance of 6.4 met

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Answer:

28.796 J

Explanation:

I hope that it's a correct answer.

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The geocentric model of the universe stated that _____.

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Earth was the center of the universe

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a waterwheel built in Hamah, Syria, has a radius of 20 m . If the tangential velocity at the wheels edge is 7.85 m/s , what is t

gtnhenbr [62]

Answer:

3.08m/s²

Explanation:

Given parameters:

Radius = 20m

Tangential velocity = 7.85m/s

Unknown:

Centripetal acceleration = ?

Solution:

Centripetal acceleration is the acceleration of a body along a circular path.

it is mathematically given as;

a = $\frac{v^{2} }{r}$

v is the tangential velocity

r is the radius

a = $\frac{7.85^{2} }{20}$ = 3.08m/s²

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What is the density of an object when volume is 80cm3 and mass is 40 g? Group of answer choices

kotegsom [21]

i think its dense

Explanation:

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A superball and a clay ball are dropped from a height of 10cm above a tabletop. They have the same mass 0.05kg and the same size

Olenka [21]

Answer:4.08 N

Explanation:

Given data

superball dropped from a height of 10 cm

Mass of ball $\left ( m\right )$ =0.05kg

time of contact $\left ( t\right )$ =34.3 $\times 10^{-3}$ s

Now we know impulse = $Force\times time\ of\ contact$ =Change in momentum

$F_{average}\times t$ = $m\left ( v-(-v)\right )$

and velocity at the bottom is given by

v= $\sqrt{2gh}$

$F_{average}\times 34.3\times 10^{-3}$ = $0.05\left ( 1.4-(-1.4)\right )$

$F_{average}$ =4.081N

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3 years ago