3 years ago

The quantity represented by vi is a function of time (i.e., is not constant).A. TrueB. False

Physics

1 answer:

iris [78.8K]3 years ago

7 0

Answer:

The answer is false

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A 5kg box slides across the floor with an initial velocity of 5m/s. If the coefficient of kinetic friction between the box and t

4vir4ik [10]

The net force on the block perpendicular to the floor is

∑ F[perp] = F[normal] - mg = 0

so that

F[normal] = (5 kg) g = 49 N

Then

F[friction] = 0.1 F[normal] = 4.9 N

so that the net force parallel to the floor is

∑ F[para] = -4.9 N = (5 kg) a

Solve for the acceleration a :

a = (-4.9 N) / (5 kg) = -0.98 m/s²

Starting with an initial velocity of 5 m/s, the box comes to a stop after time t such that

0 = 5 m/s - (0.98 m/s²) t

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Air resistance fefrgtdnjrcbrdg

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What are the units for momentum? Kg Newtons m/s kg·m/s

mariarad [96]

Answer:

kg·m/s

Explanation:

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The function s(t) represents the position of an object at time t moving along a line. Suppose s (2 )equals 146and s (6 )equals

sineoko [7]

Answer:

v(t) = 27 units

Explanation:

The function s(t) represents the position of an object at time t moving along a line such that,

$s(2)=146$

and

$s(6)=254$

We need to find the average velocity of the object over the interval of time [2,6]. The velocity of the object is equal to the total distance divided by time. It is given by :

$v(t)=\dfrac{s(6)-s(2)}{6-2}$

$v(t)=\dfrac{254-146}{6-2}$

v(t) = 27 units

So, the average velocity of the object is 27 units. Hence, this is the required solution.

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svet-max [94.6K]

Current.A moving charge is an object that changes position to one particular obsever.

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