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Kobotan [32]
1 year ago
9

What is a possible state of an object in the absence of a net force?a.)at restb.)constant velocity c.)zero accelerationd.)all of

these
Physics
1 answer:
Nezavi [6.7K]1 year ago
4 0

ANSWER:

d) all of these

STEP-BY-STEP EXPLANATION:

If no net force acts on an object, it remains at rest if it is initially at rest, or maintains its speed if it is initially in motion. Objects can move at a constant speed while experiencing zero net force; if the speed is constant, the acceleration is zero.

So the correct answer is at rest, zero acceleration, and constant speed, that is option d) all of these

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alexandr402 [8]

Answer:

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b) At height 6 m speed of ball = 9.55 m/s

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Explanation:

a)  We have equation of motion s=ut+\frac{1}{2} at^2, where s is the displacement, u is the initial velocity, t is the time taken and a is the acceleration.

s = 6 m, t = 0.5 seconds, a = acceleration due to gravity value = -9.8m/s^2

 Substituting

    6=u*0.5-\frac{1}{2} *9.8*0.5^2\\ \\ u=14.45m/s

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 b) We have equation of motion v^2=u^2+2as, where v is the final velocity

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   u = 14.45 m/s, v =0 , a = -9.8m/s^2

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     0^2=14.45^2-2*9.8*s\\ \\ s=10.65 m

  Maximum height reached = 10.65 m

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Answer:

Mental time travel has been studied by psychologists, cognitive neuroscientists, philosophers and in a variety of other academic disciplines. Major areas of interest include the nature of the relationship between memory and foresight, the evolution of the ability (including whether it is uniquely human or shared with other animals), its development in young children, its underlying brain mechanisms, as well as its potential links to consciousness, the self, and free will.

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