3 years ago

Clarify this statement acceleration due to gravity of the Earth is 9.8m/s square

Physics

1 answer:

muminat3 years ago

3 0

Answer:

it means that velocity of a body rises by 9.8m/s each second if the air resistance is nrelated

mark me

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4 years ago

Suppose that you are standing on a train accelerating at 0.39g. What minimum coefficient of static friction must exist between y

timurjin [86]

Answer:

0.39

Explanation:

In order not to slide, you must have exactly the same acceleration of the train:

$a=0.39 g$

where

g = 9.81 m/s^2

There is only one force acting on you: the static frictional force that "pulls" you forward, and it is given by

$F_s = \mu_s mg$

According to Newton's second law, the net force acting on you (so, the frictional force) must be equal to your mass times the acceleration, so we have

$F= ma = \mu_s mg$

from which we find

$\mu_s = \frac{a}{g}=\frac{0.39 g}{g}=0.39$

so, the minimum coefficient of static friction must be 0.39.

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3 years ago

A projectile is fired at a velocity of 50 m/s straight into the air. What is the velocity of the projectile when the objects dis

Arisa [49]

Answer:

the final velocity of the object is 53.04 m/s.

Explanation:

Given;

initial velocity of the projectile, u = 50 m/s

displacement of the object, d = 16 m

let the final velocity of the object = v

Apply the following kinematic equation to determine the final velocity of the projectile.

v² = u² + 2gd

v² = 50² + (2 x 9.8 x 16)

v² = 2813.6

v = √2813.6

v = 53.04 m/s

Therefore, the final velocity of the object is 53.04 m/s.

8 0

3 years ago

Clarify this statement acceleration due to gravity of the Earth is 9.8m/s square​

Clarify this statement acceleration due to gravity of the Earth is 9.8m/s square