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Posted in Physics

Gravitational force between two objects depends on


Answer:

SIZE AND DISTANCE BETWEEN THEM


Related Questions

Posted in Physics

How would the acceleration of a chain of three shopping carts compare with the acceleration of a single cart if the same force acted on both? A. 1/3 as much the single B. 1/2 as much the single C. 3 times as much the single D. 2 times as much the single

So in order to know the correct answer, let us analyze the problem. Given that a = F/m where a is acceleration, F is force and m is mass, here is the solution.

a = F/m 

a' = F/3m 

a'/a = 1/3

Based on this, the correct answer would be option A. 

1/3 as much the single  Hope this helps.

Posted in Physics

The stress force that causes a mass of rock to pull or twist in opposite directions in called ______.

Shearing

The stress force that causes a mass of rock to pull or twist in opposite directions is called shearing.

Hope this helps! :)

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. How much work in joules is done by a person who uses a force of 25 N to move a desk 3.0 m?

We Know, W = F * s
here, F = 25 N
s = 3 m

Substitute it into the expression,
W = 25 * 3
W = 75 Joule

So, your final answer is 75 J

Hope this helps!

Posted in Physics

A 4.3 kg bowling ball is initially at rest. If a 15 N force acts on it for 0.85 s, what is the final velocity of the bowling ball?

According to Newton's 2nd law of motion, F = ma ==> a = F / m =15/4.3 = 3.48 m/s^2. Now using kinematic equation, v=u+at => v= 0 + 3.48x0.85 => V= 2.958 m/s

Posted in Physics

What force is exerted on a machine?

input force :) k have a good day


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Posted in Physics

A net force of 125 N accelerates a 25.0 kg mass. What is the resulting acceleration?

Answer: a=5 m/s^2

Explanation:

The acceleration of an object can be calculated by using Newton's second law:

F=ma

where

F is the net force applied on the object

m is the mass of the object

a is its acceleration

In this problem, we have F=125 N and m=25.0 kg, so we can rearrange the equation to calculate the acceleration:

a=\frac{F}{m}=\frac{125 N}{25.0 kg}=5 m/s^2

Posted in Physics

A car starts from xi = 12m at ti = 0 and moves with the velocity graph shown in figure below. What is the objects position and t=3s and t=4s? Picture in comments below

Our starting velocity is V0 = 12m/s

There are 2 ways of solving this question
First is to use formula which connects starting speed, acceleration (which we would calculate from graph where we can see how speed changes) and time to calculate traveled distance.

S = V0 * t + 1/2*a*t^2

acceleration a is a = -4m/s^2

S(t=3s) = 18

On this value we add 12 initial meters of distance and we get S(t=3s) = 30 meters

For t=4s we get

S = 16 m

Plus initial distance of 12 m we get 30 meters

Answers are 30 and 28 meters.

------------------------------------------
second way is to find surface of graph bellow speed line for 3 and 4 seconds...

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Posted in Physics

If you increase the force on an item without changing the mass you increase acceleration? true or false?

(F)(M)=A
Force times Mass equals Acceleration.
The answer is TRUE. 
If the mass increases the number on the left side of the equation increases, thus increasing the right side as well.

Posted in Physics

Does centripetal force change in uniform circular motion?

It depends on how fast you are going and in orincipal no

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Posted in Physics

A 521-kg meteor is subject to a force of 2520 N. What is its acceleration?

Answer:

Acceleration, a=4.83\ m/s^2              

Explanation:

It is given that,

Mass of the meteor, m = 521 kg

Force acting on the meteor, F = 2520 N

Let a is the acceleration of the meteor. It can be calculated using the Newton's second law of motion. According to this law the force acting on an object is equal to the product of mass and acceleration with which it is moving. Mathematically, it is given by :

F=m\times a

a=\dfrac{F}{m}

a=\dfrac{2520\ N}{521\ kg}

a=4.83\ m/s^2

So, the acceleration of the meteor is 4.83\ m/s^2. Hence, this is the required solution.

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Posted in Physics

A student hangs a mass of 150 g on a force table at an angle of 150 degrees . If she then hangs a mass of 220 g at 270 degrees. A) at what angle should she hang a mass of 195 g so that the ring is in equilibrium? B) Draw the vectors

Horizontally: 150g*cos150 + 220g*cos270 + 195g*cosΘ = 0 
cosΘ = 0.666
Θ = ± 48º 
Vertically: 
150g*sin150 + 220g*sin270 + 195g*sinΘ = 0 
sinΘ = 0.744 
Θ = 48º

Posted in Physics

Which makes fast-moving water a greater force of erosion? A. greater heat capacity B. greater energy C. increased density D. greater oxidation

Answer:

B. Greater energy

Explanation:

Fast moving water is very energetic as its can displace very large rocks, boulders and make pebbles and sand out of them through the process r erosion. Fast moving water have kinetic energy, it opposes anything that come in its way. As river make its own channel by eroding plane. Many antecedent rivers have make their channel by cutting large mountains too.

Posted in Physics

The force of attraction between two objects, which is related to the object's mass is the definition of

Answer:

Explanation:

The gravitation force of attraction between the two bodies is directly proportional tp the product of masses of two bodies and inversely proportional to the square of distance between them.

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Posted in Physics

Work is equal to _____. force times size velocity times force distance times force

Answer : The correct option is, distance times force

Explanation :

Work : It is defined as the force acting on an object to cause a displacement. Or we can defined as the work is equal to the product of the force of an object and displacement of an object.

The formula of the work is written as,

W=F\times d

where,

W = work done

F = force applied on an object

d = displacement of an object

Hence, the work is equal to distance times force.

Posted in Physics

Selecting a signaling site and putting your signal in a suitable location is critical. a signaling site is defined as any site, based on your situation that enhances signaling efforts and the likelihood for the signal to be detected by friendly forces. what is a signaling site criterion?

The role of the criterion: Perhaps the simplest strategy that the doctor can adopt is to pick a criterion location along the internal response axis. Whenever the internal response is greater than this criterion they respond "yes". Whenever the internal response is less than this criterion they respond "no".

An example criterion is indicated by the vertical lines in Figure 2. The criterion line divides the graph into four sections that correspond to: hits, misses, false alarms, and correct rejections. On both hits and false alarms, the internal response is greater than the criterion, because the doctor is responding "yes''. Hits correspond to signal-plus-noise trials when the internal response is greater than criterion, as indicated in the figure. False alarms correspond to noise-alone trials when the internal response is greater than criterion, as indicated in the figure.

Posted in Physics

Victoria has a crate of vegetables that weighs 100 newtons she exerts a force of 100 Newtons to lift the crate with a pulley what's the mechanical advantage in this situation. Less than 1 Equal to 1 Equal to 0 More than 1

By definition, the mechanical advantage is the relationship that exists between the output force or load lifted and the value of the force applied.

Thus, using the definition, we have that the mechanical advantage is given by:

 MA = \frac{100}{100}\\MA = 1

Therefore, the mechanical advantage of lifting the box by using a pulley is equal to 1.

Answer:

The mechanical advantage in this situation is:

Equal to 1

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Posted in Physics

A sled and rider, gliding over horizontal, frictionless ice at 4.7 m/s , have a combined mass of 80 kg . The sled then slides over a rough spot in the ice, slowing down to 3.4 m/s . What impulse was delivered to the sled by the friction force from the rough spot? Express your answer to two significant figures and include the appropriate units.

Impulse is the change in momentum.
All we need is the momentum before and after.

Momentum  =  (mass) x (speed)

Before:        =  (80 kg) x (4.7 m/s)  =  376 kg-m/s

After:           =  (80 kg) x (3.4 m/s)  =  272 kg-m/s

Change in momentum  =  (376 - 272) =  104 kg-m/s


Notice that when you work with impulse, you're USUALLY calculating

                           (force) x (time).

The force is in Newtons, and the time is in seconds,
so the impulse is usually in units of

                             Newton-seconds .

So how can I say that impulse and change of momentum are
the same thing ?  Am I trying to pull a fast one on you ?

Remember that    1 Newton is  1 kg-m/s²

So                       (force) x (time) 

                     =  (Newton) x (second) 

                     =  (kg-m/s²) x (second)  =  kg-m/s .

and  Momentum = (mass) x (speed)  =  (kg) x (m/s)

The units of impulse are the same as the units of momentum !

So when you give an object some impulse, you give it exactly
that much momentum.

Posted in Physics

In order to determine the power, you must know.. a. current and voltage b. force and acceleration c. newtons and joules d. resistance and amperage

Answer:

option (a)

Explanation:

The electrical power is defined as the energy per unit time.

The formula foe the power is given by

P = V I = I^2 R = V^2 / R

So, to find the power we must know the values of current and voltage.

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Posted in Physics

An unknown force is applied to a 12 kg. The force acts at an angle of 30 degrees above the horizontal. Determine the force acting if the force acts for a horizontal displacement of 22 meters and increases the 12 kg mass's speed from 11 m/s to 26 m/s

First solve the time it takes to displace to 22 m D = 0.5( Vi – Vf)*t 22 m = 0.5 ( 11 + 26) t T = 1.1891 s Solve for acceleration D = vt + 0.5at^2 22 = (11)( 1.1891) + 0.5(1.1891^2)a A = 12.6169 m/s2   F = ma Since the work is only done in the horizontal direction F sin (30) = (12 kg) ( 12.6169 m/s2) F = 302.8056 N

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Posted in Physics

What is the force on a 1000 kilogram elevator that is falling freely under acceleration of gravity only? If the formula is force equals mass times acceleration

If Earth's gravitational pull is 9.8 meters per second, and the elevator's mass is 1000 kilograms, then the force of the elevator is 9,800.

Posted in Physics

What is the only force acting on a projectile if you ignore air resistance

After it leaves the launcher the only forces acting on a projectile are air resistance and gravity.

Posted in Physics

A force is applied to an object at rest with a mass of 100kg. A force twice as large is applied to another object at rest with a mass of 100kg. What differences in their motion would you observe? Explain your reasoning.

According to Newton's second law. £Fext=m.a
then the acceleration of the second object will be twice as that of the first since the mass of both objects is equal(100kg) and the force F is doubled. Therefore the acceleration of object 2 will be more than that of object 1 (double)

hope this helps.

best regards

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