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# What is the energy of a 15 pounds 2x4 traveling at 100 mph and how does it compare to a high power rifle bullet with an energy of 2339 ft-lbf?

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The formula for kinetic energy is KE=1/2(mass)(velocity)^2, therefore 15 lbs travelling at 100 MPH has a kinetic energy of 5,012 ft lbs or more than twice that of the bullet! To get the answer you have to convert 15 lbs to mass by dividing by the gravitational constant (32.2 Ft/sec^2) and converting 100MPH to ft/sec. 15x(100x1.467)^2/(2x32.2)=5,012
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# How fast does a bullet from a rifle travel?

An AR -15 will push a 5.56 2800 feet per second!

# What is the kinetic energy of a baseball traveling 90 mph?

A baseball weighs 145 grams 90 mph = 40.23 meters/sec KE = 1/2 mass  x v2 = .5 x 145g x (40.23m/s)2 = 72.5g x 1618.45 m2/s2 = 117337.84  g m2/s2 = 117.34 kg m2/s2 = 117.34 J

# How far does a bullet travel from a rifle?

Depends on the caliber of the rifle and the elevation of the barrel above the horizontal. A .22 LR fired at about a 30 degree angle can travel about 1.5 miles. A 30-06 about 4

# How fast does a bullet travel in mph?

761 mph (miles per hour) (The muzzle velocity of a bullet varies widely depending on the caliber, type of bullet, type of cartridge, the powder charge, and the gun barrel. Muz

# How many mph does a bullet travel?

  It depends on several factors. Bullet can travel as slow as a few hundred feet per second up to several thousand feet per second. 1000 feet per second is about 682 MPH.

# How far will a bullet form a high powered rifle travel under water?

  Can't be answered without knowing the caliber, bullet weight and if it is fresh or salt water.

# Heat energy travels from an object with a high?

Temperature to an object with a lower temperature

# Heat energy travels from an object with a high what?

temperature to an object with a low temperature

kinetic energy

# A bullet traveling upwards has what type of energy?

it has both potential and kinetic energies as when it is going upwards, the potential energy increases while the kinetic energy decreases until it reaches the top, and then th

# How fast does a rifle bullet travels?

The speed of bullets fired from rifles varies greatly, from about 600 feet per second to 5,000 feet per second.

Kinetic Energy

# How high can a rifle bullet travel straight up?

Depends on the rifle and the cartridge that it fires. A 30-06 firing a 180 grain bullet can reach just over 10,000 ft straight up. Data taken from Gen. Julian Hatcher's ballis

# How is foot pounds of energy measured for bullet impact?

It can be projected by using the formula E= MV 2 divided by 450400. E is the energy in foot lbs M is mass of bullet in grains V 2 is velocity in feet per second, squared.
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# How does the accerelation of the rifle compare with that of the bullet?

When a bullet is fired out of a gun, the bullet's acceleration and the gun's acceleration are equal in magnitude by opposite in direction. This is the cause of kickback from t
In Science

# How long will it take to travel 100 miles at 15 mph?

90 miles = 15 x 6 = 6 hours 100 - 90 = 10 miles 1 hour = 60 minutes 10/15 x 60 = 40 minutes Answer: 6 hours 40 minutes
In Science

# How does kinetic energy affect the stopping distance of a vehicle travelling at 30 mph compare to the same vehicle travelling at 60 mph?

Kinetic energy equals one half times mass times velocity squared. If the velocity is doubled, from 30MPH to 60 MPH, the kinetic energy for the same mass would be four times gr