A 25lb brick falls 4ft what was the force of impact?
To calculate the force of impact, we need to use the formula for force:
Force = Mass * Acceleration
In this case, the mass of the brick is 25 pounds. However, we need to convert the mass from pounds to a more suitable unit for this calculation, such as kilograms, since the metric system is widely used in calculations involving force.
To convert pounds to kilograms, we use the conversion factor: 1 pound = 0.453592 kilograms.
So, the mass of the brick in kilograms would be:
25 pounds * 0.453592 kilograms/pound = 11.3398 kilograms (rounded to four decimal places)
Next, we need to calculate the acceleration. Acceleration due to gravity on Earth is approximately 9.8 meters per second squared (m/s^2). To convert the distance fallen from feet to meters, we use the conversion factor: 1 meter = 3.28084 feet.
So, the height fallen in meters would be:
4 feet * 0.3048 meters/foot = 1.2192 meters (rounded to four decimal places)
Using the formula Force = Mass * Acceleration, we can now calculate the force of impact:
Force = 11.3398 kilograms * 9.8 m/s^2 = 111.28524 Newtons (rounded to four decimal places)
Therefore, the force of impact when a 25-pound brick falls 4 feet is approximately 111.2852 Newtons.