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Lilit [14]
3 years ago
9

Janet ran 30 meters in 4 seconds,what is her speed.

Physics
2 answers:
lubasha [3.4K]3 years ago
8 0

Answer:

7.5 meters per second

Explanation:

30 / 4 = 7.5

7.5 * 1 = 7.5

7.5 * 2 = 15

7.5 * 3 = 22.5

7.5 * 4 = 30

MrRa [10]3 years ago
5 0

7.5 i believe it's right.

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Answer : a=10\ m/s^2

Explanation :

It is given that,

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a=\dfrac{F}{m}

a=\dfrac{300\ N}{30\ Kg}

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Hence, this is the required solution.

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2 years ago
Who water rocket starts from rest and roses straight up with an acceleration of 5 m/s until it runs out of water 2.5 seconds lat
Kitty [74]

Answer:

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Explanation:

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V = U +at

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2) motion under gravity (assume it goes upto  h2 height )

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using motion equations upwards (assuming g= 10m/s² downwards)

V²= U² +2as

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h2 = 7.8125 m

maximum height = h1 + h2

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3 years ago
Which compound has ionic bonding? A. Cl2 B. HF C. CaO D. NO2
GrogVix [38]

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