Let us follow the motion of the hammer first. Because the elevator is in motion, when he drops the hammer, because of inertia, there is a slight moment when the hammer also rises with the elevator. Eventually it will reach its highest peak and drop down to the floor. So, the total time for the hammer to reach the floor would include: (1) the time for it to rise with the elevator to its highest peak and (2) the time for the free fall from the highest peak to the floor.
1.) Time for it to rise with the elevator to its highest peak: Hmax = v²/2g = (6 m/s)²/2(9.81 m/s²) = 1.835 m Time to reach 1.835 m = 1.835 m * 1 s/6 m = 0.306 s
Time for the free fall from the highest peak to the floor: t = √2y/g, where y is the total height y = 1.835 m + 42 m = 43.835 m So, t = √2(43.835 m )/(9.81 m/s²) = 2.989 s
Therefore, the total time is 0.306 s + 2.989 s = 3.3 seconds
2.) Velocity of impact of a free-falling body is: v = √2gy v = √2(9.81 m/s²)(43.835 m) v = 29.33 m/s
When chemical bonds are broken or formed, new particles are created. Therefore, frying an egg is a chemical change because it results in the formation of new particles.
Hello to solve this problem we must initially draw the free body diagram of the car, and remember that for a body to be in balance the sum of its moments must be zero.
When this equation is raised, we can find the relationship between the forces of the front and rear wheel, and the complete procedure is attached.
