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tigry1 [53]
3 years ago
9

12. A sprinter has an acceleration of 5m/s” during the first 2 seconds of the race. What

Physics
1 answer:
Gala2k [10]3 years ago
7 0

Answer:

v=10m/s

Explanation:

a=\frac{vf-vi}{t}\\ 5m/s^{2}=\frac{vf-0}{2}\\  vf=5*2\\vf=10 m/s

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IgorLugansk [536]

Answer:

The work done on the Frisbee is 1.36 J.

Explanation:

Given that,

Mass of Frisbee, m = 115 g = 0.115 kg

Initial speed of Frisbee, u = 12 m/s at a point 1 m above the ground

Final speed of Frisbee , v = 10.9674 m/s when it has reached a height of 2.00 m. Let W is the work done on the Frisbee by its weight. According to work energy theorem, the work done is equal to the change in its kinetic energy. So,

W=\dfrac{1}{2}m(v^2-u^2)\\\\W=\dfrac{1}{2}\times0.115\times\left((10.9674)^{2}-(12)^{2})\right)\\\\W=-1.36\ J

So, the work done on the Frisbee is 1.36 J. Hence, this is the required solution.

3 0
3 years ago
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What is the definition of physics
Stella [2.4K]

Answer:

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3 0
3 years ago
An airplane traveling at 201 m/s makes a turn. What is the smallest radius of the circular path (in km) that the pilot can make
egoroff_w [7]

Answer:

the smallest radius of the circular path is 8.1 km

Explanation:

The computation of the smallest radius of the circular path is given below:

Given that

V = Velocity = 201 m/s

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As we know that

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