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alukav5142 [94]
2 years ago
5

Alguien que sepa de electromecánica porfavor

Physics
1 answer:
kkurt [141]2 years ago
8 0
LAPA HDIDOSHSUWJWVWIHDHDOSSHSVWIME
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In trampoline competitions, a good jump is one that lasts about 1.8 seconds. (A) How high can an athlete who stays in the air 1.
KonstantinChe [14]

Answer:

3.97305 m

Explanation:

a = Acceleration due to gravity = 9.81 m/s²

If a jump lasts for 1.8 seconds this means that from the moment when the person leaves the ground till the person touches the ground again it takes 1.8 seconds. So, maximum height reached will be at half the time of the jump i.e., 0.9 seconds.

u = Initial velocity = 0

Equation of motion

s=ut+\frac{1}{2}at^2\\\Rightarrow s=0t+\frac{1}{2}9.81\times 0.9^2\\\Rightarrow s=3.97305\ m

So, height of the jump is 3.97305 m.

4 0
3 years ago
an athlete is running at a constant velocity with a javelin held in his right hand.the force he is applying on thejavelin as he
mestny [16]
50 Nm
work=force*change in position
7 0
3 years ago
Galileo attempted to measure the speed of light by measuring the time elapsed between his opening a lantern and his seeing the l
Dafna11 [192]

Answer:

The distance is 2.58\times10^{7}\ m.

Explanation:

Given that,

Time \Delta t = 0.2\ s

The velocity is no more than a 14 % error in the speed of light.

So,

Velocity v= c\times 86\%

We need to calculate the distance

Using formula of speed

v = \dfrac{d}{t}

d = v\times t

Where, v = speed

d = distance

t = time

Put the value into the formula

d = 3\times10^{8}\times\dfrac{86}{100}\times0.2

d=516\times10^{5}\ m

We know that,

The one side distance d' is

d'=\dfrac{d}{2}

d'=\dfrac{516\times10^{5}}{2}

d'=2.58\times10^{7}\ m

Hence, The distance is 2.58\times10^{7}\ m.

5 0
3 years ago
What are 2 things that legal immigrants can NOT do.
Alexandra [31]
One thing they can’t do is go somewhere out of their country
7 0
3 years ago
WILL MARK BRAINLIEST FOR 2 QUESTIONS!!
Irina18 [472]

1) Work is the scalar quantity

2) The ideal mechanical advantage of the ramp is 2

Explanation:

1)

In physics, there are two types of quantities:

- Scalar quantity: a scalar quantity is a quantity having only a number and its units. Therefore, it has no direction. Examples of scalar quantities are: distance, speed, energy, mass, temperature...

- Vector quantity: a vector quantity is a quantity having both a magnitude (number+units) and a direction. Examples of vector quantities are: displacement, velocity, force, acceleration...

Let's analyze now the quantities given:

- work : it has only a magnitude, so it is a scalar

- displacement : it has a magnitude and a direction, so it is a vector

- parallel component of force : it has a magnitude and a direction, so it is a vector

- perpendicular component of force: it has a magnitude and a direction, so it is a vector

2)

The ideal mechanical advantage (IMA) of a machine is the mechanical advantage in absence of frictional forces, so when there are no loss of energy.

For a ramp, the IMA is calculated as

IMA=\frac{L}{h}

where

L is the length of the ramp

h is its height

For the ramp in this problem, we have

L = 6.00 m

h = 3.00 m

Therefore, its ideal mechanical advatnage is

IMA=\frac{6}{3}=2

Learn more about levers and other machines:

brainly.com/question/5352966

#LearnwithBrainly

7 0
3 years ago
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