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Ronch [10]
3 years ago
13

Velocity is:

Physics
1 answer:
Romashka-Z-Leto [24]3 years ago
4 0

Answer:

A

Explanation:

A is correct as Velocity includes the + and - signs, indicating the direction followed by the magnitude which is the speed.

B is Wrong. Velocity is <em>d</em><em>i</em><em>s</em><em>p</em><em>l</em><em>a</em><em>c</em><em>e</em><em>m</em><em>e</em><em>n</em><em>t</em><em> </em>divided by time.

C Im not sure, Sorry..

D is wrong. Same explanation as B

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S_A_V [24]

Answer:

207.4 N

Explanation:

The torque \tau  on a body is

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Therefore, torque is also given by

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Where \theta is the angle between r and F.

Use the expression of torque.

Substitute L for r in the equation \tau = rF\sin \theta

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Force required to pull the wrench is given as,

F = \frac{\tau }{{L\sin \theta }}

Substitute 47{\rm{ N}} \cdot {\rm{m}}  for \tau, 25 cm for L, and 115o for \theta  

\begin{array}{c}\\F = \frac{{47{\rm{ N}} \cdot {\rm{m}}}}{{\left( {25{\rm{ cm}}} \right)\sin {{115}^{\rm{o}}}}}\left( {\frac{{1{\rm{ cm}}}}{{{{10}^{ - 2}}{\rm{ m}}}}} \right)\\\\ = 207.435{\rm{ N}}\\\\ \approx 207.4{\rm{ N}}\\\end{array}  

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3 years ago
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Answer:hypothesis: the plant died of lack  of light,moisture,or water

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