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Georgia [21]
3 years ago
14

Care este pozitia unui mobil cand t(s)=14 si x(m)=12?​

Physics
1 answer:
mario62 [17]3 years ago
3 0

name shrawan sha

DtD_LpOZ3Xm_0ff

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The ball has 7.35 joules of potential energy at position B. At position A, all of the energy changes to kinetic energy. The velo
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I assume that the ball is stationary (v=0) at point B, so its total energy is just potential energy, and it is equal to 7.35 J. 
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2 years ago
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Answer:

-414.96 N

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

v^2-u^2=2as\\\Rightarrow a=\frac{v^2-u^2}{2s}\\\Rightarrow a=\frac{0^2-3.85^2}{2\times 0.75}\\\Rightarrow a=-9.88\ m/s^2

F=ma\\\Rightarrow F=42\times -9.88\\\Rightarrow F=-414.96\ N

The force the ground exerts on the parachutist is -414.96 N

If the distance is shorter than 0.75 m then the acceleration will increase causing the force to increase

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