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gogolik [260]
1 year ago
10

What do it mean by the value of gravitational constant is 6.67×10^-11Nm^2/kg^2​

Physics
1 answer:
luda_lava [24]1 year ago
8 0

Answer:

gravitational constant value means it was never change in any particular area of the Earth

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A ball is thrown vertically downward at 10 m/s. what is it’s speed 1s and 2s later
soldi70 [24.7K]

Answer:

20 m/s

30 m/s

Explanation:

Given:

v₀ = -10 m/s

a = -9.8 m/s²

When t = 1 s:

v = v₀ + at

v = (-10 m/s) + (-9.8 m/s²) (1 s)

v = -19.8 m/s

When t = 2 s:

v = v₀ + at

v = (-10 m/s) + (-9.8 m/s²) (2 s)

v = -29.6 m/s

Rounded to one significant figures, the speed of the ball at 1 s and 2 s is 20 m/s and 30 m/s, respectively.

3 0
3 years ago
If a one-pound weight were one foot from the pivot or shaft of a lever, how many pound-feet of force would result? A. 4 B. 1 C.
mixas84 [53]

The force is still 1 pound.

The TORQUE around the pivot is (force) x (distance from the pivot) = 1 foot-pound. (B)

8 0
2 years ago
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What causes the moon's phases?
Anon25 [30]
The answer is:  [D]:  "the position of the moon each month in relation to THE SUN AND THE MOON" .
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   Note of interest:  The origin of the word "month" was:  "moon-th" — but shortened to "month" — (no coincidence!).
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3 0
2 years ago
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A rock is at the top of a 20m tall hill. The rock has a mass of 10kg. How much potential energy does the rock have?
Rashid [163]

Answer:

Ggghhhjhhhhhbdufdusty

4 0
2 years ago
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if the angle btw the incline and horizontal surface is increased what will happen the magnitude of force needed to hold the obje
Scilla [17]

Answer:

The force needed will be greater to hold the object at rest.

Explanation:

For a better understanding let's take a look at the attached image.

In the image there is an example of this condition, we have an object of 3 kg-f mass, the first angle between the horizontal and the inclined plane is 35°. When we increase the angle to 45°. We can realize that we need to hold the object with a stronger force.

The calculation and the equations based on Newton's laws can be found in the attached image.

6 0
3 years ago
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