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Talja [164]
3 years ago
13

A 68 kg student runs up a flight of stairs that is 7 m high in 9 seconds. Calculate

Physics
2 answers:
NeTakaya3 years ago
8 0
Power = Work/time
Work= energy
Potential energy =mxgxh
Power=mxgxh/t
Power=68x10x7/9
Power=529 watts
ki77a [65]3 years ago
4 0

Answer:4760/9 watts

Explanation:

mass(m)=68kg g=10m/s^2 height(h)=7m time(t)=9seconds

Power=(m x g x h)/t

Power=(68 x 10 x 7)/9

Power=4760/9 watts

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2 years ago
Two spherical objects have masses of 3.1 x 10^5 kg and 6.5 x 10^3 kg. The gravitational attraction between them is 65 N. How far
nata0808 [166]

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4.55 x 10⁹m

Explanation:

Given parameters:

Mass of object 1  = 3.1 x 10⁵kg

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Unknown:

Distance between them  = ?

Solution:

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        65  = \frac{6.67 x 10^{11} x 3.1 x 10^{5} x 6.5 x 10^{3}   }{distance^{2} }    

   Distance  = 4.55 x 10⁹m

         

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Two forces are applied to a 17 kg box, as shown. The box is on a smooth surface. Which statement best describes the acceleration
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