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Alexxandr [17]
3 years ago
12

Shelley gives her little sister a 5-meter head start in a bike race. The race ends 15 meters east from where Shelley started. If

her little sister completes the race in 5 seconds, what is her sister’s average velocity? (Round your answer to the nearest whole number.)
Physics
2 answers:
Igoryamba3 years ago
4 0

Answer:

The answer is 2 m/s east

Explanation:

lilavasa [31]3 years ago
3 0

Answer:

B.) 2 m/s

Explanation:

I hope this helps!! ( Sorry if my handwriting is hard to read, I´m working on making it neater at the moment. )

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There are 30 students in Ms. Andrews’ fourth grade class. There are 6 times as many students in the entire fourth grade as there
KatRina [158]

Answer:

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6 0
4 years ago
A shopper weighs 4.00 kg of apples on a supermarket scale whose spring obeys Hooke's law and notes that the spring stretches a d
Irina-Kira [14]

Answer:

a) 0.040625 m

b) 5.02272 J

Explanation:

k = Spring constant

x = Stretched length

F = Force

a)

F=kx\\\Rightarrow k=\frac{F}{x}\\\Rightarrow k=\frac{4\times 9.81}{0.025}\\\Rightarrow k=1569.6\ N/m

F=kx\\\Rightarrow x=\frac{F}{k}\\\Rightarrow x=\frac{6.5\times 9.81}{1569.6}\\\Rightarrow x=0.040625\ m

Extension of the spring would be 0.040625 m

b) Work done in a spring

W=\frac{1}{2}kx^2\\\Rightarrow W=\frac{1}{2}\times 1569.6\times 0.08^2\\\Rightarrow W=5.02272\ J

The work done by the shopper to stretch this spring a total distance of 8.00 cm is 5.02272 J

4 0
3 years ago
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