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3 years ago

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Un tren viaja a 35 m/s y debe reducir su velocidad a 18 m/s al pasar por un puente. si tarda 5,5 segundos en reducir esta veloci

dad responde:
a) ¿que distancia recorre en este tiempo?
b) ¿cual es su aceleración?

1 answer:

a_sh-v [17]3 years ago

5 0

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You throw a rock horizontally out of a 7th story window. You time that it takes 3.7 seconds to hit the ground, and measure that

Nady [450]

Since we are only looking at the vertical height, we can use the free fall equation to find the height:
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h = 0.5*(9.81 m/s^2)*(3.7 s)^2
h = 67.15 m
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3 years ago

In this experiment, you will use a track, a toy car, and some washers to explore Newton’s first two laws of motion. You will mak

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How can we experimentally verify newton's laws?

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4 years ago

Read 2 more answers

A jet plane is launched from a catapult on an aircraft carrier. In 2.0 s it reaches a speed of 42 m/s at the end of the catapult

Dvinal [7]

Answer:

Explanation:

Given

time taken $t=2\ s$

Speed acquired in 2 sec $v=42\ m/s$

Here initial velocity is zero $u=0$

acceleration is the rate of change of velocity in a given time

$a=\frac{v-u}{t}$

$a=\frac{42-0}{2}=21\ m/s^2$

Distance travel in this time

$s=ut+0.5at^2$

where

s=displacement

u=initial velocity

a=acceleration

t=time

$s=0+\0.5\times 21\times (2)^2$

$s=42\ m$

so Jet Plane travels a distance of 42 m in 2 s

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3 years ago

An amplifier has a 50 watt output and a 5 watt input. what is the gain in decibels for this amplifier, rounded to the nearest de

Marrrta [24]

Gain in decibels is given by;

Gain db = 10*log (Po/Pi), where Po = Power output, Pin = Power input

Substituting;

Gain in db = 10 * log (50/5) = 10 db

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3 years ago

A) Two workers are trying to move a heavy crate. One pushes onthe crate with a force A, which has amagnitude of 445 newtons and

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Answer:

Divide then multiply or multiply then divide

Explanation:

to get the answer of a and b

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3 years ago