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givi [52]
3 years ago
5

In the equation for the gravitational force between two objects, which quantity must be squared?​

Physics
2 answers:
timama [110]3 years ago
4 0

Answer: The distance between the objects.

Explanation: The equation for the gravitational force is written as:

F = G*m1*m2/r^2

Where r is the distance between the objects, m1 and m2 are the masses and G is the gravitational constant.

This cuantity is in the denominator because, as larger is the distance, smaller is the strenght of the field.

And is squared because is a force that spreads in a solid angle (as the change of area in a growing sphere )

Trava [24]3 years ago
3 0
The distance quantity/ measurement must be squared.
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A girl rolls a ball up an incline and allows it to re- turn to her. For the angle and ball involved, the acceleration of the bal
zalisa [80]

Answer:

3.28 m

3.28 s

Explanation:

We can adopt a system of reference with an axis along the incline, the origin being at the position of the girl and the positive X axis going up slope.

Then we know that the ball is subject to a constant acceleration of 0.25*g (2.45 m/s^2) pointing down slope. Since the acceleration is constant we can use the equation for constant acceleration:

X(t) = X0 + V0 * t + 1/2 * a * t^2

X0 = 0

V0 = 4 m/s

a = -2.45 m/s^2 (because the acceleration is down slope)

Then:

X(t) = 4*t - 1.22*t^2

And the equation for speed is:

V(t) = V0 + a * t

V(t) = 4 - 2.45 * t

If we equate this to zero we can find the moment where it stops and begins rolling down, that will be the highest point:

0 = 4 - 2.45 * t

4 = 2.45 * t

t = 1.63 s

Replacing that time on the position equation:

X(1.63) = 4 * 1.63 - 1.22 * 1.63^2 = 3.28 m

To find the time it will take to return we equate the position equation to zero:

0 = 4 * t - 1.22 * t^2

Since this is a quadratic equation it will have to answers, one will be the moment the ball was released (t = 0), the other will eb the moment when it returns:

0 = t * (4 - 1.22*t)

t1 = 0

0 = 4 - 1.22*t2

1.22 * t2 = 4

t2 = 3.28 s

7 0
2 years ago
A ball rolls along the floor with a constant velocity of 6m/s how far it have to gone after 50 seconds
Alika [10]
50(6)=300.
The ball traveled 300 meters in 50 seconds.
Hope this helps and please give brainliest!
8 0
3 years ago
The energy due to Earth pulling down on an object is called ___.
Slav-nsk [51]

Gravity is the energy due to Earth pulling down on an object.

6 0
3 years ago
Define the term dimension<br>​
Vladimir79 [104]

Answer:

Q1. A measurable extent of a particular kind, such as length, breadth, depth, or height.

Q2. A dimensional constant is a physical quantity that has dimensions and has a fixed value. Some of the examples of the dimensional constant are Planck's constant, gravitational constant, and so on.

Q3. Physical quantities which posses dimensions and have variable are called dimensional variables. Examples are length, velocity, and acceleration etc.

Q4. Dimensionless variables are the quantities which doesn't have any dimensions the the value is a variable. Eg: angle = arc/ radius. Dimensions = L/L. = 1. So angle does not have any dimensions and the value can vary.

Q5. Principle of Homogeneity states that dimensions of each of the terms of a dimensional equation on both sides should be the same. This principle is helpful because it helps us convert the units from one form to another.

Q6. Dimensional analysis has been around a long time, Newton called it the "Great principle of Similitude", but the modern form can be traced back to James Clerk Maxwell. It was Maxwell who distinguished mass [A/], length [£], and time [7"] as the independent dimensions from which others could be derived.

Q7. Mass, length, time, temperature, electric current, amount of light, and amount of matter.

Q8. Dimensional analysis is used to convert the value of a physical quantity from one system of units to another system of units. Dimensional analysis is used to represent the nature of physical quantity. The expressions of dimensions can be manipulated as algebraic quantities.

Hope that helps. x

4 0
2 years ago
which of the following is not a property of an acid? reacts with metals bitter taste reacts with carbonate turns litmus paper re
notka56 [123]
The property that does not describe an acid is that it has a bitter taste. Acids have a sour taste, Bases have a bitter taste.
7 0
3 years ago
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