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kotegsom [21]
3 years ago
15

For a projectile launched at an angle, are the forces in the vertical direction balanced or unbalanced?

Physics
2 answers:
marissa [1.9K]3 years ago
8 0
Unbalanced because of the different forces pulling and pushing in certain directions
mart [117]3 years ago
7 0
Unbalanced as long as it is moving up or down. Immediately after being fired the vertical force from the launch will be greater than the force of gravity. for an instant at the the beginning of the projectiles decent the force will actually be balanced and there will be no vertical movement. After that the force of gravity is greater.

tl;dr they are unbalanced 
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d. both a and b

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Two argon atoms form the molecule Ar2 as a result of a van der Waals interaction with U0 = 1.68×10-21 J and R0= 3.82×10 the freq
mel-nik [20]

Answer:

\mathbf{f_o =1.87 \times 10^{11} \ Hz}

Explanation:

From the given information:

The elastic potential energy can be calculated by using the formula:

U_o = \dfrac{1}{2}kR_o^2

Making K the subject;

K = \dfrac{2 U_o}{R_o^2}

k = \dfrac{2\times 1.68 \times 10^{-21}}{(3.82\times 10^{-10})^2}

k = 2.3 × 10⁻² N/m

Now; the frequency of the small oscillation can be determined by using the formula:

f_o = \dfrac{1}{2 \pi}\sqrt{\dfrac{k}{m}}

where;

m = mass of each atom = 1.66 × 10⁻²⁶ kg

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6 0
3 years ago
A 5.75 mm high firefly sits on the axis of, and 11.3 cm in front of, the thin lens A, whose focal length is 5.77 cm . Behind len
weeeeeb [17]

Answer

given,

focal length of lens A = 5.77 cm

focal length of lens B= 27.9 cm

flies distance from mirror = 11.3 m

now,

Using lens formula

\dfrac{1}{f} = \dfrac{1}{p} + \dfrac{1}{q}

\dfrac{1}{5.77} = \dfrac{1}{11.3} + \dfrac{1}{q}

q =11.79 cm

image of lens A is object of lens B

distance of lens = 59.9 - 11.79 = 48.11

now, Again applying lens formula

\dfrac{1}{f} = \dfrac{1}{p} + \dfrac{1}{q'}

\dfrac{1}{27.9} = \dfrac{1}{48.11} + \dfrac{1}{q'}

q' =66.41 cm

hence, the image distance from the second lens is equal to q' =66.41 cm

6 0
3 years ago
Pierre cycles at 4 miles per hour and travels a distance of 13 miles. How long
amm1812

Answer:

His journey took him 3 hours 15 minutes.

Explanation: 4 miles every hour. So 1 hr is equal to 4 miles, 2 hrs is equal to 8 miles, 3 hrs is equal to 12 miles. Now he just has 1 miles left, and since it takes him a hour to cycle 4 miles, 60 divided by 4 is 15. Therefore, 1 mile is equal to 15 minutes.

4 0
4 years ago
Read 2 more answers
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