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3 years ago

What is the difference between work done by the gravitational force on descending and ascending objects?

1 answer:

8 0

The difference between work done by the gravitational force on descending and ascending objects is that for descending objects a terminal velocity will be reached where the object will not fall any faster that it already is. For an ascending object, its velocity will come down the longer gravity has an effect on it until the object begins to descend and the velocity of an ascending object will continue to change the longer gravity has an effect on it.

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9 How can you prove that air has weight

Art [367]

Answer:

Air does, in fact, have weight, and here's a simple way you can prove it. You'll need two identical balloons, a string, and a dowel. Attach the uninflated balloons to either end of the dowel. Attach the string to the center of the dowel and then hang it from something.

Explanation:

8 0

3 years ago

Read 2 more answers

How does the theory of natural selection explain the diversity of life?

Pavlova-9 [17]

Because the ones that have better adaptions survive and spread on the genes for that adaptation

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3 years ago

A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway truck ramp th

aleksklad [387]

Answer:

The velocity is 30.279 m/s

Explanation:

Consider the initial speed of the semi-trailer be v

Then, initial kinetic energy = $\frac{1}{2} mv^2$

According to question, the semi-trailer coast along a ramp, which is inclined at an angle of 170, and to a distance of 160m to stop

Change in vertical position = $h=160 \times \sin 17^{\circ}-0$ = 46.779m

Final potential energy of semitrailer = mgh

Applying principle of conservation of energy,

$\frac{1}{2} mv^2$ = mgh

Solving for v, we get $v^2$ = 2gh = 2*9.8*46.779 = 916.8684

$v^2$ = 916.8684

v = 30.279 m/s

Therefore, the velocity is 30.279 m/s

6 0

3 years ago

A ball is projected upward at time t=0.0s, from a point on a roof 90m above the ground. The ball rises, then falls and strikes t

chubhunter [2.5K]

As v becomes zero at the highest point, i prefer considering different travelling directions so it will become less complicated.
dont forget to add the total time up .

also to master the skills, write down the "uvsat" may help (thats the way i found it easier to handle problems)

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3 years ago

What is the largest possible magnitude of the acceleration of the electron due to the magnetic field?

Alina [70]

Thank you for posting your question here at brainly. But your question seems incomplete. I will assume you based the situation below:

An electrons moves at 2.0x10^6 m/s through a region in which there is a magnetic field of unspecified direction and magnitude 7.4x10^-2 T.

The largest possible magnitude of the acceleration of the electron due to the magnetic field is = 2.6 × 10 ¹⁶ m / s ²

6 0

3 years ago