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Alex777 [14]
3 years ago
8

Jimmy walks 3 miles east then 1 mile west. What is the distance Jimmy traveled?

Physics
1 answer:
AleksAgata [21]3 years ago
4 0

Answer:

2 miles

Explanation:

Jimmy walked forward 3 miles east (to the right)

Then, he backtracked and walked 1 mile west (to the left)

This can be written as:

3 - 1 = ?

3 - 1 = 2

Therefore, Jimmy traveled a total of 2 miles.

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Minimum speed will  be equal to 2.213 m/sec

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We have given radius of the r = 2 m

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So \mu mg=\frac{mv^2}{r}

\frac{v^2}{r}=\mu g

v=\sqrt{\mu rg}=\sqrt{0.25\times 2\times 9.8}=2.213m/sec

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"Giant Swing", the seat is connected to two cables as shown in the figure (Figure 1) , one of which is horizontal. The seat swin
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The horizontal force is m*v²/Lh, where m is the total mass. The vertical force is the total weight (233 + 840)N. 

<span>Fx = [(233 + 840)/g]*v²/7.5 </span>

<span>v = 32.3*2*π*7.5/60 m/s = 25.37 m/s </span>

<span>The horizontal component of force from the cables is Th + Ti*sin40º and the vertical component of force from the cable is Ta*cos40º </span>

<span>Thh horizontal and vertical forces must balance each other. First the vertical components: </span>

<span>233 + 840 = Ti*cos40º </span>

<span>solve for Ti. (This is the answer to the part b) </span>

<span>Horizontally </span>

<span>[(233 + 840)/g]*v²/7.5 = Th + Ti*sin40º </span>

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<span>Th = [(233 + 840)/g]*v²/7.5 - Ti*sin40º </span>

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A race-car drives around a circular track of radius RRR. The race-car speeds around its first lap at linear speed v_iv i ​ v, st
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Answer and Explanation: <u>Centripetal</u> <u>Acceleration</u> is the change in velocity caused by a circular motion. It is calculated as:

a_{c}=\frac{v^{2}}{r}

v is linear speed

r is radius of the curve the object in traveling along

For its first lap:

a_{c}_{1}=\frac{v_{i}^{2}}{R}

After a while:

a_{c}_{2}=\frac{(4v_{i})^{2}}{R}

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Comparing accelerations:

\frac{a_{c}_{2}}{a_{c}_{1}}=\frac{16.v_{i}^{2}}{R}.\frac{R}{v_{i}^{2}}

\frac{a_{c}_{2}}{a_{c}_{1}}=\frac{16.v_{i}^{2}}{R}.\frac{R}{v_{i}^{2}}

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