2 years ago

Practice

Physics

1 answer:

stiv31 [10]2 years ago

5 0

Answer:

The answer is Letter B The car travel at a constant veloc

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Write and solve a MA or efficiency problem

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Output energy is: 100 joule

100/200*100=%50 efficiency

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A 65kg has the weight force of

AURORKA [14]

Answer:

65*9.8=637N

Explanation:

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What is the speed of a bird of mass 8kg which has kinetic energy of 8836J?

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Answer:

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2 years ago

9. A sailor pulls a boat along a dock using a rope at an angle of 60.0° with the

aleksklad [387]

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2 years ago

A small rubber ball is launched by a compressed-air cannon from ground level with an initial speed of 17.3 m/s directly upward.

elena-s [515]

Answer:

h=15.27m

Explanation:

Since at maximum height the vertical velocity must be null it's better to use the formula:

$v_f^2=v_i^2+2ad$

We will use this formula for the vertical direction, choosing the upward direction as the positive one, so we have:

$0=v_i^2+2ah$

$h=-\frac{v_i^2}{2a}$

which for our values is:

$h=-\frac{(17.3m/s)^2}{2(-9.8m/s^2)}=15.27m$

7 0

3 years ago