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Andrew [12]
3 years ago
7

Look at the two vectors below:

Physics
1 answer:
Komok [63]3 years ago
5 0

a) Draw their beginnings coming out of one point

b) Use addition in parallelogram.

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Calculate the acceleration of a car that begins at rest at a stop light and accelerates to a speed of 20m/s in a 10 sec time per
Dominik [7]
A = delta v over delta t delta v is calculated with final velocity less initial velocity then delta v is equals to 20 - 0 that is 20m/s and to calculate delta t is like delta v is final time less initial time as initial time always is 0 the delta t is equals to 10s then a = 20/10 then acceleration is 10m/s^2 (remember that is squared)
5 0
3 years ago
Why the distance between two loudspeakers have to be large??​
tangare [24]

Answer:because each speaker has a large angle of of coverage (horizontal and vertical)

They place them apart to prevent their signals (sounds produced) from getting into each other's way as this may cause interference (which may be destructive.

Explanation:

7 0
3 years ago
What is the average speed of a cheetah that runs 88 m in 5 seconds
vovangra [49]

So, the average speed of the Cheetah is 17.6 m/s.

<h3>Introduction</h3>

Hello ! I'm Deva from Brainly Indonesia. This time, I will help regarding the average speed. The average speed is obtained from finding the average of the speeds that occur or can be detected from the division between distance and travel time. The average speed can be formulated by :

\boxed{\sf{\bold{\overline{v} = \frac{s}{t}}}}

With the following condition :

  • \sf{\overline{v}} = average speed (m/s)
  • s = shift or distance objects from initial movement (m)
  • t = interval of the time (s)

<h3>Problem Solving</h3>

We know that :

  • s = shift = 88 m
  • t = interval of the time = 5 seconds

What was asked :

  • \sf{\overline{v}} = average speed = ... m/s

Step by step :

\sf{\overline{v} = \frac{s}{t}}

\sf{\overline{v} = \frac{88}{5}}

\boxed{\sf{\overline{v} = 17.6 \: m/s}}

So, the average speed of the Cheetah is 17.6 m/s.

5 0
3 years ago
What would land with more force, a feather moving at a certain acceleration, or a football moving with the same acceleration?
Jlenok [28]

Answer:

the ball ofc

Explanation:

the ball have a greater mass then the feather and it have the same speed as the feather

4 0
2 years ago
Two resistors of resistances R1 and R2, with R2&gt;R1, are connected to a voltage source with voltage V0. When the resistors are
Contact [7]

Answer:

r=0.127

Explanation:

When  connected in series

Current = I

When connected in parallel

Current = 10 I

We know that equivalent resistance

In series  R = R₁+R₂

in parallel  R= R₁R₂/(R₂+ R₁)

Given that voltage is constant (Vo)

V = I R

Vo = I (R₁+R₂)  ------------1

Vo = 10 I (R₁R₂/(R₂+ R₁)) -------2

From above equations

10 I (R₁R₂/(R₂+ R₁)) = I (R₁+R₂)  

10  R₁R₂ =  (R₁+R₂) (R₂+ R₁)

10  R₁R₂  = 2  R₁R₂  + R₁² + R₂²

8 R₁R₂  =     R₁² + R₂²

Given that

r =  R₁/R₂

Divides by R₂²

8R₁/R₂  = ( R₁/R₂)²+ 1

8 r = r ² + 1

r ² - 8 r+ 1 =0  

r= 0.127 and r= 7.87

But given that R₂>R₁  It means that r<1 only.

So the answer is r=0.127

8 0
3 years ago
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