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2 years ago

Perform the following mathematical operation and report the answer to the correct number of significant figures 143.6/21.2

Physics

1 answer:

jekas [21]2 years ago

8 0

Answer:

143.6/21.2

=6.773584906

=6.8

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Drupady [299]

Answer:

7.6427m/s

Explanation:

Given: $v_a=4.7m/s, \theta_a=33.0\textdegree and \ v_b=4.5m/s$

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#And along y-axis:

$0=-sin\theta_a+mv_bsin\theta_b$

#Solving for $\theta_b$ :

$sin\rheta_b=\frac{v_a}{v_b}sin\theta_a=4.7/4.5\times sin33.0\textdegree\\=0.5688\\\therefore \theta_b=34.67\textdegree$

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$v_i=4.7cos 33.0\textdegree +4.5cos 34.67\textdegree\\=7.6427m/s$

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3 years ago

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3 years ago