Which of the following is typically NOT a method scientist use to determine astronomic distances

While a roofer is working on a roof that slants at 37.0 ∘∘ above the horizontal, he accidentally nudges his 92.0 NN toolbox, cau

eduard

Answer:

The speed is $v =8.17 m/s$

Explanation:

From the question we are told that

The angle of slant is $\theta = 37.0^o$

The weight of the toolbox is $W_t = 92.0N$

The mass of the toolbox is $m = \frac{92}{9.8} = 9.286kg$

The start point is $d = 4.25m$ from lower edge of roof

The kinetic frictional force is $F_f = 22.0N$

Generally the net work done on this tool box can be mathematically represented as

$Net \ work done = Workdone \ due \ to \ Weight + Workdone \ due \ to \ Friction$

The workdone due to weigh is = $mgsin \theta * d$

The workdone due to friction is = $F_f \ cos\theta * d$

Substituting this into the equation for net workdone

$W_{net} = mgsin\theta * d + F_f \ cos \theta *d$

Substituting values

$W_{net} = 92 * sin (37) * 4.25 + 22 cos (37) * 4.25$

$= 309.98 J$

According to work energy theorem

$W_{net} = \Delta Kinetic \ Energy$

$W_{net} = \frac{1}{2} m (v - u)^2$

From the question we are told that it started from rest so u = 0 m/s

$W_{net} = \frac{1}{2} * m v^2$

Making v the subject

$v = \sqrt{\frac{2 W_{net}}{m} }$

Substituting value

$v = \sqrt{\frac{2 * 309.98}{9.286} }$

$v =8.17 m/s$

6 0

3 years ago

Specific data such as age, income, family size, and occupation, used for marketing purposes, is called

True [87]

B. demographics.

Specific data such as age, income, family size, and occupation, used for marketing purposes, is called demographics.
NOT:
A. a secondary market.
C. survey statistics.
D. the target market.

5 0

3 years ago

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U are asked to measure the amount of liquid held in a sports drink bottle.which is an appropriate unit of measurement? is grams,

saul85 [17]

Milliliters would be used to find the volume AKA amount of liquid

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4. The earth exerts a gravitational force of 3.5 N on an object. What is the mass of

Romashka-Z-Leto [24]

Answer:

I'm not sure

Explanation:

sorry I'm not smart that's why I have this app

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3 years ago

Second class lever short note

seraphim [82]

Answer:

wow

Explanation:

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3 years ago

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