PHYSICS HIGH SCHOOL

For a winter fair, some students decide to build 30.0 kg wooden pull carts on sled skids. If two 90.0 kg passengers get in, how much force will the puller have to exert to move a pull cart? The coefficient of maximum static friction between the sled skids and the road is 0.15

Answers

Answer 1
Answer:

Explanation:

Total mass = 90 + 90 + 30 kg = 210 kg

Normal force = 210 kg ( 9.81 m/s^2) = 2060.1 N

Force of friction to overcome = normal force x coeff of static friction

           F = 2060.1 x .15 = ~ 309 N  to get the cart moving...

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You or your personal trainer should always use the _____ safety screening.PAC-R
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Answers

The answer to the question presented above would be PAR-Q or the Physical Activity Readiness Questionnaire. The purpose of this questionnaire is to identify if you have any medical risks and to know your overall medical background for future reference of prevention of complications whenever you're training.

Answer:

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Explanation:

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what environmental conditions might cause damage to the alveolar sacs, and what would be the consequences of that damage?

Answers

Following are the major environmental conditions that might cause a damage to the alveolar sacs:

1. Air pollution
2. Dust storms
3. Smog
4. Smoke

The aforementioned conditions can cause temporary or permanent damage to alveolar sacs. Damages may include: building up fluid in the sacs and accumulation of dust particles in the sacs. The consequences of that may include coughing or preventation of oxygen (air supply) into the lungs. 

If the mass of Earth were increased by a factor of 2.00 , by how many times would the force between Earth and the Sun increase?

Answers

Answer:

If the mass of Earth were increased by a factor of 2.00, the force between Earth and the Sun would increase by a factor of 2.00 as well.

Explanation:

The gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. The formula for gravitational force (F) is given by:

F = (G * m1 * m2) / r^2

Where:

F = gravitational force

G = gravitational constant (a constant value)

m1 = mass of the first object

m2 = mass of the second object

r = distance between the centers of the two objects

If the mass of Earth is increased by a factor of 2.00 (meaning it becomes 2 times its original mass), we can denote the original mass of Earth as "M" and the increased mass as "2M."

Now, let's calculate how the force between Earth and the Sun changes:

Original force (F1) = (G * M * Msun) / r^2

New force (F2) = (G * 2M * Msun) / r^2

Now, we can find the ratio of the new force to the original force:

F2 / F1 = [(G * 2M * Msun) / r^2] / [(G * M * Msun) / r^2]

Notice that the gravitational constant (G), distance (r), and the mass of the Sun (Msun) are the same in both equations and cancel out when calculating the ratio. Therefore, you're left with:

F2 / F1 = (2M) / M = 2

So, if the mass of Earth were increased by a factor of 2.00, the force between Earth and the Sun would increase by a factor of 2.00 as well.

What is the difference between electric motor and electric generator?

Answers

Electric motor convert electrical energy into machenical energy & electric generater convert mechanical energy into electrical energy...
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Find the percentage of the total work lost to friction if 28.7 J of work is put into pushing a block up a ramp resulting in 14.2 J of stored potential energy at the top.

Answers

Answer:

14.5 joules

50.5 %

Explanation:

Energy initial +work= energy final

28.7 + work = 14.2

friction did - 14.5 joules of work so percantage of work lost is just 14.5/28.7 *100 or 50.5 %

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Answers

Increasing the tension of a spring affects a wave on the spring because it increases the frequency. When the tension rises, so does the frequency.

Answer: Increases the frequency of the wave

Explanation:

Increasing the tension of a spring means increasing its stiffness. The wave produced thereafter has greater frequency.  

Higher tension causes the spring to have greater restoring force causing it to quickly come back to its equilibrium position. Thus, the speed of the wave also increases.

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