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yaroslaw [1]
3 years ago
5

A lever and fulcrum are used to lift a fallen tree, which has a weight of 480N. if the lever has a mechanical advantage of 5.5,

what is the input force that will begin lifting the tree of the ground
Physics
1 answer:
Alisiya [41]3 years ago
8 0

Answer:

<h2>The input force is 87.27N</h2>

Explanation:

Mechanical advantage (M.A)of a machine is the ratio of load to effort

<h2>Given</h2>

M.A= 5.5

load= 480N

effort= ?

Applying the formula and substituting to find the effort we have

M.A= \frac{load}{effort}

5.5= \frac{480}{effort}\\\effort= \frac{480}{5.5} \\\effort= 87.27N

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Express the answer to 4.31x10^7 multiplied by 5.41x10^5 scientific notation.
I am Lyosha [343]

Answer:

The product of the two numbers is 2.33* 10^13

Explanation:

Given

4.31x10⁷ and 5.41x10⁵

Required

Multiply

The multiplication of the two digits is represented as thus:

Result = 4.31 * 10^7 * 5.41 * 10^5

This can also be rewritten as

Result = 4.31 * 5.41 * 10^7 * 10^5

Multiply 4.31 and 5.41

Result = 23.3171 * 10^7 * 10^5

Apply laws of indices

Result = 23.3171 * 10^{7+5}

Result = 23.3171 * 10^{12}

The scientific notation is always in the form: a * 10^n

Where 1 \leq\ a \leq 10

So:

23.3171 can be rewritten as 2.33171 * 10

So, we have:

Result = 2.33171 * 10* 10^{12}

Also, apply law of indices again

Result = 2.33171 * 10^{1+12}

Result = 2.33171 * 10^{13}

It's always advisable (but not compulsory to approximate to 1 or 2 decimal places)

So:

Result = 2.33* 10^{13}

<em>Hence; the product of the two numbers is 2.33* 10^13</em>

7 0
3 years ago
Describe how work done is related to a change in volume of a fluid. 100 points
Nookie1986 [14]

Answer: work is the pressure acting through the change in volume

Explanation:

In the same way that work is defined as force operating over a distance,  work is the pressure acting through the change in volume.   Pressure is comparable to force in pressure–volume work, while volume is analogous to distance in the classic definition of work.

4 0
2 years ago
Read 2 more answers
A pendulum is swinging next to a wall. The distance from the bob of the pendulum to the wall varies in a periodic way that can b
nexus9112 [7]

The formula of the trigonometric function that models the distance HHH from the pendulum's bob to the wall after t seconds is

H(t) = 15 -6sin(2.5π(t -0.5))

Detailed explanation:

The function can be expressed as the following for the midline M, amplitude A, period T, and time t0 at which the function deviates from the midline:

 H(t) = M -Asin(2π/T(t -t0))

The equation is based on the parameters M=15, A=6, T=0.8, and t0 = 0.5.

H(t) is equal to 15 -6sin(2.5π(t -0.5))

<h3>What is function?</h3>

The trigonometric functions in mathematics are real functions that connect the right-angled triangle's angle to the ratios of its two side lengths .In all areas of study that involve geometry, such as geodesy, solid mechanics, celestial mechanics, and many others, they are widely used.

To learn more about functions visit:

brainly.com/question/15607563

#SPJ4

The correct question is:

A pendulum is swinging next to a wall. The distance from the bob of the swinging pendulum to the wall varies in a periodic way that can be modeled by a trigonometric function.

The function has period 0.80.80, point, 8 seconds, amplitude 6 \text{ cm}6 cm6, start text, space, c, m, end text, and midline H = 15 \text{ cm}H=15 cmH, equals, 15, start text, space, c, m, end text. At time t = 0.5t=0.5t, equals, 0, point, 5 seconds, the bob is at its midline, moving towards the wall.

Find the formula of the trigonometric function that models the distance HHH from the pendulum's bob to the wall after t seconds. Define the function using radians.

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