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2 years ago

The ___________ collision occurs when the vehicle strikes an object, strikes another vehicle, or rolls over.

Physics

1 answer:

igor_vitrenko [27]2 years ago

7 0

The first collision occurs when the vehicle strikes an object, strikes another vehicle, or rolls over.

<h3>What is Collision?</h3>

This is characterized by the coming together of two bodies in which they exert force over a short time.

There are different types of collision and the one which occurs when an object, strikes another vehicle, or rolls over is known as first collision.

Read more about Collision here brainly.com/question/24915434

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Scientists have investigated how quickly hoverflies start beating their wings when dropped both in complete darkness and in a li

Vesna [10]

Answers:

A) 0.204 m

B) 0.285 s

Explanation:

<h2>Answer A:</h2>

This described situation is free fall, this means the initial velocity of the fly is zero, and the equation that will be used is:

$y=y_{o}+V_{o}t-\frac{1}{2}gt^{2}$ (1)

Where:

$y$ is the final height of the fly

$y_{o}=40 cm=0.4 m$ is the initial height of the fly

$V_{o}=0$ is the initial velocity of the fly

$t=200(10)^{-3} s$ is the time

$g=9.8 m/s^{2}$ is the acceleration due to gravity

$y=0.4 m+0-\frac{1}{2}(9.8 m/s^{2})(200(10)^{-3} s)^{2}$ (2)

$y=0.204 m$ (3) This is the distance at which the fly would begin to beat its wings

<h2>Answer B:</h2>

In this part we will also use equation (1), but we will find the time:

$y=y_{o}+V_{o}t-\frac{1}{2}gt^{2}$ (1)

Where:

$y=0$ is the final height of the fly

$y_{o}=40 cm=0.4 m$ is the initial height of the fly

$V_{o}=0$ is the initial velocity of the fly

$t$ is the time we need to find

$g=9.8 m/s^{2}$ is the acceleration due to gravity

$0=0.4 m+0-\frac{1}{2}(9.8 m/s^{2})t^{2}$ (4)

Isolating $t$ :

$t^{2}=\frac{(-2)(-0.4 m)}{9.8 m/s^{2}}$ (5)

$t=0.285 s$ (6) This is the time it would take for a fly to hit the bottom of the box

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