2 years ago

4: Question 2 - 10.0 pts possible

Physics

1 answer:

Orlov [11]2 years ago

8 0

Answer:

5. All of the statements are true; non is false

Explanation:

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What are the units for the spring constant, k?

vitfil [10]

Answer:

C. newtons/meter

Explanation:

To find the units of spring constant you can use the hook's law, which says,

F = k × x where

F = force (unit Newton)

k = spring constant

x = expansion or contraction ( unit m)

So by this equation you can get that

k = F / X

So you get the units as N/m

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3 years ago

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Which is the best example of a cycle: a turn of a wheel or a slide down a ski slope?

melisa1 [442]

Definitiely a turn of a wheel. Skiing down a ski slope is going down at an angle and it's usually straight. The turn of a wheel just makes a lot more sense

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3 years ago

If the archerfish spits its water 30 degrees from the horizontal aiming at an insect 1.2 m above the surface of the water, how f

Burka [1]

Answer:

The speed is $v = 9.8 \ m/s$

Explanation:

From the question w are told that

The angle made is $\theta = 30^o$

The distance above the surface of the water is $h_{max} = 1.2 \ m$

The value of $g = 10 \ m/s^2$

The maximum height attained by the fish is mathematically evaluate as

$h_{max} = \frac{v^2 sin ^2 \theta }{2g }$

Making v which is the speed of the fish the subject of the formula

$v = \sqrt{ \frac{2gh_{max}}{ sin^2 \theta } }$

substituting values

$v = \sqrt{ \frac{2*10 *1.2 }{ [sin (30)]^2 } }$

$v = 9.8 \ m/s$

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3 years ago

If a 20kg object is moved across the floor and the coefficient of friction is 0.255. What is the frictional force?

Sladkaya [172]

Ff=μN=μmg=0.255*20=5.1 N

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3 years ago

Q7. What caused the early materials to clump together?

tekilochka [14]

Answer:

C. pressure

because heat expands and so does explosions and gravity is just gravity.

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2 years ago