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4 years ago

Which one is it plzz help

Physics

1 answer:

Damm [24]4 years ago

6 0

Answer:

Stayed the same

Explanation:

Potential energy is a function of mass, gravity and height relative to a reference level. If we take as the reference level the soil, this is the level where the potential energy is zero. Since in problem it is mentioned that the track is flat, this means that there are no height changes with respect to the reference level, therefore we can say that the potential energy remains unchanged.

Ep = m*g*h

where:

m = mass [kg]

g = gravity [m/s^2]

h = elevation [m]

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Which of the following never cause a change in the motion of an object? A. Net forces B. Unbalanced forces O C. Balanced forces

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Answer:

balanced force never changes its motion

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3 years ago

The uncertainty in the position of an electron along an x axis is given as 5 x 10-12 m. What is the least uncertainty in any sim

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Answer:

The least uncertainty in the momentum component px is 1 × 10⁻²³ kg.m.s⁻¹.

Explanation:

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3 years ago

A package is dropped from an air balloon two times. In the first trial the distance between the balloon and the surface is Hand

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Answer:

<em>The final speed of the second package is twice as much as the final speed of the first package.</em>

Explanation:

<u>Free Fall Motion</u>

If an object is dropped in the air, it starts a vertical movement with an acceleration equal to g=9.8 m/s^2. The speed of the object after a time t is:

$v=gt$

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$\displaystyle t=\sqrt{\frac{2y}{g}}$

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$\displaystyle v=g\sqrt{\frac{2y}{g}}$

Rationalizing:

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$\displaystyle v_1=\sqrt{2gH}$

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$\displaystyle v_2=2\sqrt{2gH}$

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$\displaystyle v_2/v_1=\frac{2\sqrt{2gH}}{\sqrt{2gH}}$

Simplifying:

$\displaystyle v_2/v_1=2$

The final speed of the second package is twice as much as the final speed of the first package.

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3 years ago

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Answer:

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3 years ago

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