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RideAnS [48]
3 years ago
14

What is 7.866 rounded to the nearest 10ths?

Physics
2 answers:
stira [4]3 years ago
7 0

the answer is 7.9 because 6 is closer to 10 than 0

Anarel [89]3 years ago
4 0
The answer is 7.9!!!!!!
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Work of 5 Joules is done in stretching a spring from its natural length to 19 cm beyond its natural length. What is the force (i
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Answer:

Explanation:

Given that,

5J work is done by stretching a spring

e = 19cm = 0.19m

Assuming the spring is ideal, then we can apply Hooke's law

F = kx

To calculate k, we can apply the Workdone by a spring formula

W=∫F.dx

Since F=kx

W = ∫kx dx from x = 0 to x = 0.19

W = ½kx² from x = 0 to x = 0.19

W = ½k (0.19²-0²)

5 = ½k(0.0361-0)

5×2 = 0.0361k

Then, k = 10/0.0361

k = 277.008 N/m

The spring constant is 277.008N/m

Then, applying Hooke's law to find the applied force

F = kx

F = 277.008 × 0.19

F = 52.63 N

The applied force is 52.63N

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a ball is thrown vertically upward with an initial speed of 40 m/s. how high is the ball above the ground when it stops
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Answer:

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Explanation:

40m/s will be reduced to 0m/s in 4 seconds. 4 seconds x 40m/s would be 160m up, but you will only get half of that because you decelerate linearly to 0m/s. This leaves you with 4 x 20 = 80m.

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