Balanced forces acting on an object cause the object to accelerate. true or false

Answers

Answer 1

Answer: Balanced forces that is acting on an object will NOT cause the object to accelerate, instead it will cause Static Equilibrium-the object is at rest. For example, a book is on the table and there is a downward force because of the gravity but also there is an upward force from the surface that helps to balance the weight of an object which is called a support force. It happens that the net force of an object is equal to zero, means ALL OF THE FORCE CANCEL OUT! Which leads us to the conclusion that, balanced forces will cause an object to be at rest and not to accelerate.

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Two balls, each with a mass of 0.844 kg,exert a gravitational force of 8.45 × 10−11 Non each other.How far apart are the balls? The value of the universal gravitational constant is 6.673 × 10−11 N m2/kg2.

Answers

The Universal Gravitation law is F=GMm/d^2
So: 8.45x10^-11=6,673x10^-11x0,844x0,844/d^2
d^2=1,78, so finale d=1,33m

The gun, mount, and train car of a railway had a total mass of 1.22 x 10^6 kg. The gun fired a projectile that was 80 cm in diameter and weighed 7502 kg. In the firing, the gun has been elevated 20 degrees above the horizontal. If the railway gun at rest before firing and moved to the right at a speed of 4.68 m/s immediately after firing, what was the speed of the projectile as it left the barrel (muzzle velocity)? How far will the projectile travel if air resistance is neglected? Assume that the wheel axles are frictionless.

Answers

1) According to the law of conservation of momentum ..
Horiz recoil mom of gun (M x v) = horiz. mon acquired by shell (m x Vh)

1.22^6kg x 5.0 m/s = 7502kg x Vh
Vh = 1.22^6 x 5 / 7502 .. .. Vh = 813 m/s

Barrel velocity V .. .. cos20 = Vh / V .. ..V = 813 /cos20 .. .. ►V = 865 m/s

2) Using the standard range equation .. R = u² sin2θ /g

R = 865² x sin40 / 9.80 .. .. ►R = 49077 m .. (49 km)

Nuclear energy can be used to power _______.a. street lights
b. 4es
c. homes
d. all of the above

Answers

Nuclear power plants produce radioactivewaste that must be stored properly. It is very impossible for a nuclear power plantto have no waste at all since lots of chemicals are used to create the processas it gives energy to other machines. Nuclear energy can be used to power allof the above choices. Radioactive waste can not be released into local watersupplies since the wastes are very radioactive and may cause mutation to thefishes and bioaccumulation which will affect humans as well. It will also causeair pollution if the chemicals are not stored properly.

The total potential and kinetic energy of all the microscopic particles in an object make up itsa. nuclear energy.
b. chemical energy.
c. electric energy.
d. thermal energy.

Answers

b. chemical energy
because thats the only way i see it out of your anwser choices hope i helped

The ozone layer absorbs most of the incoming _____ radiation

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The ozone layer absorbs most of the incoming ultraviolet rays radiation from the sun. The ozone layer is found at the second layer of the atmosphere, stratosphere.

Name three devices that can store electric potential energy

Answers

Potential energy, unlike kinetic, is stored energy. This energy comes from different sources. An object with potential energy also has the ability to produce energy if something triggers it. Example, a charged battery, a car on top of a hill, and capacitors.

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Where are magnetic fields strongest near a bar magnet

The brightest spot where the light directly hits an object.

Bird man is flying horizontally at a speed of 33m/s and a height of 86m. Bird man releases a turd directly above the start of the field. How far from the start of the field should the robot hold the bucket to catch the turd.