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marishachu [46]
2 years ago
9

Please help meee please please

Physics
1 answer:
Natalija [7]2 years ago
3 0

Answer:

I think it's c but don't know for sure

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One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching the f
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Answer:

3.60342 seconds

Explanation:

v = Initial velocity of snowball = 25 m/s

g = Acceleration due to gravity = 9.81 m/s²

\theta_1 = First angle = 75°

The second angle will be

\theta_2=90-\theta_1=90-75=15^{\circ}

Horizontal speed for first throw

v_{x1}=vcos\theta_1\\\Rightarrow v_{x1}=25\times cos75\\\Rightarrow v_{x1}=6.47047\ m/s

Horizontal speed for second throw

v_{x2}=vcos\theta_1\\\Rightarrow v_{x2}=25\times cos15\\\Rightarrow v_{x2}=24.14814\ m/s

Horizontal range is given by

R=\frac{v^2sin(2\theta)}{g}\\\Rightarrow R=\frac{25^2\times sin(2\times 75)}{9.81}\\\Rightarrow R=31.85\ m

Time period for first throw

t_1=\frac{R}{v_{x1}}\\\Rightarrow t_1=\frac{31.85}{6.47047}\\\Rightarrow t_1=4.92236\ s

Time period for second throw

t_2=\frac{R}{v_{x1}}\\\Rightarrow t_2=\frac{31.85}{24.14814}\\\Rightarrow t_2=1.31894\ s

The time difference is

t=4.92236-1.31894=3.60342\ s

The second ball should be thrown 3.60342 seconds later

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