suppose an asteroid of radious 50m strikes the earth surface,what could be the impact of such collision
The important aspect of this is that the asteroid would probably hit with a speed of thousands of miles per hour.
You could calculate the mass of the asteroid if you chose. Use for example the density of granite and a volume of (4/3)pi (50)^3. Then calculate the momentum using a speed for example of several thousand miles per hour.
However if you just want a word description of what would happen look up on Google or elsewhere the record of previous encounters, for example one in Siberia that devastated a large area of forest that was luckily not a city.
In addition to the information that Damon has provided, you may find this information helpful and interesting:
http://science.howstuffworks.com/asteroid-hits-earth.htm
Typical asteroid impact speeds, relative to earth, are usually in a range of tens of thousands of mph, roughly equlaivalent to a few times the earth's orbital speed. Because impact energy is proportional to the square of the relative speed, it is important to use an accurate speed when making estimates of asteroid impact effects.
The subjects of asteroid impact modeling and search for asteroids likely to hit the Earth in the next century are active areas of research.
The impact of an asteroid colliding with Earth depends on various factors such as the size, speed, angle of impact, and composition of the asteroid. However, I can provide a general idea of the potential impact of a hypothetical scenario where an asteroid with a radius of 50 meters strikes the Earth's surface.
To determine the impact, we need to consider the kinetic energy of the asteroid at the time of impact. The formula to calculate kinetic energy is KE = (1/2) * mass * velocity^2.
1. Mass: To calculate the mass, we need to know the density of the asteroid and the formula for the volume of a sphere. Suppose we assume an average density for the asteroid of 3,000 kg/m^3, which is a typical value for stony asteroids. The volume (V) of a sphere can be calculated using V = (4/3) * π * radius^3. Using the given radius of 50 meters, we can plug in the values to find the volume, and then multiply it by the density to get the mass.
2. Velocity: Estimating the velocity of an asteroid depends on several factors, such as its trajectory and origin. Let's assume a conservative value of 20 km/s (kilometers per second), which is within the range of typical asteroid impact velocities.
Once we have the mass and velocity, we can calculate the kinetic energy using the formula mentioned above.
To determine the impact effects, we can refer to the Earth Impact Effects Program, which is a tool developed by scientists to estimate the effects of various impact scenarios. By inputting the calculated kinetic energy, you can get an estimation of the possible consequences, such as the size of the crater, the magnitude of the explosion, the extent of fireball effects, and potential for local or global damage.
Keep in mind that this is a simplified explanation, and actual impact scenarios involve many more complex factors. Professional scientists and organizations like NASA closely track and study asteroids to better understand their potential impact on Earth and develop strategies for mitigating any potential threats.