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igor_vitrenko [27]
3 years ago
11

Can someone help me asap please​

Physics
1 answer:
Vesna [10]3 years ago
4 0

Answer:

<u>Resultant</u><u> </u><u>force</u><u> </u><u>is</u><u> </u><u>2</u><u>0</u><u> </u><u>N</u>

Explanation:

Resolving vertically:

{ \sf{F_{y} = (8 \cos 30 \degree) + (12 \cos 30 \degree)   }} \\ { \sf{ \sum F_{y} = 17.3 \: newtons }}

Resolving horizontally:

{ \sf{F_{x} = (8 \sin 30 \degree) + (12 \sin 30 \degree)   }} \\ { \sf{ \sum F _{x}  = 10 \: newtons}}

Resultant force:

{ \boxed{ \bf{F =  \sqrt{ {F _{x} }^{2} +   {F _{y} }^{2} } }}} \\ { \sf{F =  \sqrt{ {17.3}^{2} +  {10}^{2}  } }} \\ { \sf{F =  \sqrt{399.29} }} \\ F = 19.98 \approx20  \: newtons

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kakasveta [241]
A,c, and d are your answers :)
7 0
3 years ago
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a dog runs after the car, the car is travelling at an average speed of 5 m/s, the dog runs 20 m in 5s. does she catch the car
ratelena [41]

No

Explanation:

Average speed of car = 5m/s

Distance run by dog = 20m

Time taken = 5s

problem;

does the dog catches the car = ?

Solution;

let us determine speed of the dog;

   Speed = \frac{distance}{time}  = \frac{20}{5} = 4m/s

The average speed of the car is 5m/s

Average speed of the dog is 4m/s

The dog is slower than the car and it will not catch the car at this rate.

learn more:

Average speed brainly.com/question/5063905

#learnwithBrainly

7 0
3 years ago
One clue we can observe that means a chemical reaction has occurred is the formation of light. What is one chemical reaction you
dimaraw [331]

Answer:

There are five signs of a chemical change:

Color Change.

Production of an odor.

Change of Temperature.

Evolution of a gas (formation of bubbles)

Precipitate (formation of a solid)

Explanation:

I just went ahead and gave you the five signs of chemical change hoped it helped

8 0
3 years ago
What happens to the composition of an atom to cause it to become positively or negatively charged?
Usimov [2.4K]
An atom gains one or more electrons and becomes negatively charged, or loses one or more electrons and becomes positively charged.
5 0
3 years ago
Find the weight of the following mass; <br> (a) 220g <br>please show the formula​
Marrrta [24]

Explanation:

weight=mass*gravity

w=mg

first change 220g to kg like this

1kg=1000g

?=220g

1kg*220g/1000kg=220/1000g

mass =0.22kg

now we can continue

w=0.22kg*10m/s^2 or w=0.22kg*10N/kg

=2.2N =2.2N

hope it helps you

5 0
3 years ago
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