How does speed affect momentum

2 answers:

8 0

Momentum = mass • velocity
M = m • v

Speed is a scalar quantity
Velocity is a vector quantity

That is truly the only difference

iren2701 [21]3 years ago

3 0

Momentum = mass • velocity
M = m • v

Speed is a scalar quantity
Velocity is a vector quantity.hope i helped. :-)

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Which of the following describes how the current in a circuit can be increased. Select all that apply.

andreyandreev [35.5K]

Answer:
Option B: Increase the voltage, while keeping the resistance constant.

Explanation:
Current is directly proportional to voltage, but indirectly proportional to resistance.

5 0

3 years ago

Xelga [282]

Answer:

About 7.67 m/s.

Explanation:

Mechanical energy is always conserved. Hence:

$\displaystyle \begin{aligned} E_i & = E_f \\ \\ U_i + K_i &= U_f + K_f\end{aligned}$

Where U is potential energy and K is kinetic energy.

Let the bottom of the slide be where potential energy equals zero. As a result, the final potential energy is zero. Additionally, because the child starts from rest, the initial kinetic energy is zero. Thus:

$\displaystyle U_i = K_f$

Substitute and solve for final velocity:
$\displaystyle \begin{aligned} mgh_i &= \frac{1}{2}mv_f^2 \\ \\ 2gh_i &= v^2_f \\ \\ v_f &= \sqrt{2gh_i} \\ \\ & =\sqrt{2(9.8\text{ m/s$^2$})(3.00\text{ m})} \\ \\ & \approx 7.67\text{ m/s} \end{aligned}$

In conclusion, the child's speed at the bottom of the slide is about 7.67 m/s.

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2 years ago

A stone is thrown vertically upward with an initial velocity of 25m/s , calculate time taken to return to the thrower

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Answer:

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How does the ringing sound of a telephone travels from the phone to your ears?

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Its important please answer

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Answer: Well we see that v= u- ft/m

lets say that ft= feet and m= mass

so you divide those and subtract u

leaving you with the value of v which is 13

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