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jeyben [28]
3 years ago
15

A car from rest moves a distance s(m) in t second, where s=3t³+t²/4 determine(i)the initial acceleration of the car (ii)the acce

leration of the car at the end of 3rd second​
Physics
1 answer:
Sunny_sXe [5.5K]3 years ago
8 0

Answer:

0.5 , 54.5

Explanation:

for acceleration we should derivate the equation 2 times

x=3t³+t²/4

v=9t²+t/2

a=18t+1/2

a(0)=0.5

a(3)=54.5

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Beyond what point must an object be squeezed for it to become a black hole
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Answer:

Condition

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Explanation:

Basically black hole is an object from which light rays can not escape it means   to go out from gravitational field , that body should thrown with speed greater then light.

Let's do some calculation

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If we give kinetic energy equal to magnitude of Potential energy as on surface it will escape.

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It will be more better for black hole if above ratio (analogous to density ) is more then above calculated

4 0
3 years ago
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3 years ago
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skelet666 [1.2K]

Answer:

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There are the few steps which are discussed below should be taken to increase or extend the life of tires.

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(2)  Avoid fast stop: Fast stop of the vehicle will also increase the pressure on the tires due to the friction between the tires and the road will decrease the life of tires.

(3) Avoid sharp turns: The alignment of the wheels and tires are in such a way that they work properly when vehicle is drive in a straight path but sharp turn will increase the uneven pressure on the tires will lead to decrease the life of tires.

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