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Mazyrski [523]
3 years ago
7

I need help thank you​

Physics
1 answer:
Brums [2.3K]3 years ago
3 0

Answer:

D

Explanation:

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A projectile is shot at an angle 45 degrees to the horizontalnear the surface of the earth but in the absence of air resistance.
juin [17]

Answer:

Explanation:

Given

For first case

launch angle \theta =45^{\circ}C

at highest point h=150 m/s

150=u\cos 45

u=\frac{150}{\cos 45}=212.132 m/s

For second case

\theta _2=37^{\circ}C

at highest Point velocity is u\cos \theta _2

=212.132\times \cos 37

=169.41 m/s

as there is no acceleration in x direction therefore horizontal velocity is same          

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3 years ago
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One particular descent goes from 2100m to 1600m. Assuming work done against friction is 90% of the potential energy change of th
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Answer:

1/2 M V^2 = .1 M g H       where 10% of PE goes into KE

V^2 = .2 g H = .2 * 9.8 * (2100 - 1600) = 980 m^2 / s^2

V = 31.1 m/s       increase in speed during descent

1 km / hr = 1000 m / 3600 sec = .278 m/s

V = 31.1 m/s / (.278 m/s / km /hr)= 112 km/hr

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2 years ago
Can uh Believe??<br>Am Leaving Coz of it​
zhannawk [14.2K]

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fo sure

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Newton's third law of motion says that for every action there is a(n)<br> and opposite reaction.
aksik [14]

Answer:

that's correct.

Explanation:

4 0
3 years ago
A baseball player throws a baseball. The ball traveled 35 yards before it landed on the ground. The ball stayed in the air for 3
Free_Kalibri [48]
Average speed = (distance traveled) / (time to cover the distance)

                         =  (35 yards)  /  (3.8 seconds)

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3 years ago
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