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3 years ago

In the absence of an external force, a moving object will...

Physics

1 answer:

antoniya [11.8K]3 years ago

4 0

In the absence of an external force, a moving object will move with a constant velocity in a straight line.

This is according to Newton's first law of motion that states: An object continues to be in its state of rest or uniform motion and in the same direction not unless acted upon by an external force to change that state.

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The driver of a car is driving the car very fast.

PIT_PIT [208]

Because the persons head is probably slammed into some part of the car and that means that the persons slammed on the brakes really hard so the person is probably injured
i hope this helps

6 0

3 years ago

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Atmospheric pressure decreases with increment in height.<br> give reason

jekas [21]

Answer:

pressure=height × density×acc due to gravity

pressire is directly proportional to height hence it decreses with decrease in height

here air column height is measured upside down so decreases witn increment

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3 years ago

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A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is

IRINA_888 [86]

Answer:

s=4.44 m

Explanation:

Given that

Coefficient of the kinetic friction ,μ = 0.13

Initial velocity ,u= 3.4 m/s

Final velocity of the box ,v= 0 m/s

The acceleration due to friction force

a= - μ g

Now by putting the values in the above equation

a= - 0.13 x 10 ( take g= 10 m/s²)

a= - 1.3 m/s²

We know that

v²= u ² + 2 a s

s=distance

a=acceleration

v=final speed

u=initial speed

Now by putting the values in the above equation

0²= 3.4² - 2 x 1.3 x s

$s=\dfrac{3.4^2}{2\times 1.3}\ m$

s=4.44 m

The distance cover by box will be 4.44 m.

6 0

3 years ago

What’s the potential difference across a 5.0 ohms resistor that carries a current of 5.0A

vivado [14]

Answer:

The correct answer is B-25 V

Explanation:

We apply Ohm's Law, according to which:

V = i x R

V = 5A x 5Ω

V= 25 V

Being V the potential difference whose unit is the VOLT, i the current intensity (Ampere) and R the electrical resistance (ohm)

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4 years ago

Straight line motion is hard to experience on Earth because:

nika2105 [10]

I think its friction and gravity change the motion hope this helps :)

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3 years ago