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An arrow is shot straight up at an initial velocity of 250ms How long will it take to hit the ground?
Wiki User
∙ 14y ago
This is a velocity question so u need to use uvaxt
Wiki User
∙ 14y ago
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How do you generate 250ms delay in embedded c?
Use 'usleep' or 'nanosleep'
A bullet with a mass of 0050kg is fired from a gun of a mass 9kg the bullet has a velocity of 250ms What is the velocity with which the gun recoils?
Using the principle of conservation of momentum, we can calculate the velocity of the gun by setting the total momentum before firing equal to the total momentum after firing. The momentum of the bullet is (0.05 kg)(250 m/s), and the momentum of the gun and bullet system is initially 0. After firing, the momentum of the gun and bullet system must still equal (0.05 kg)(250 m/s), so you can solve for the velocity of the gun.
Why did the Apollo 11 radio beep?
The radio signal beep heard during the Apollo 11 mission was a means of tracking the spacecraft's location and velocity. This signal helped ground control monitor the mission's progress and trajectory as the spacecraft traveled to the moon and back.
How do you make a digital watch program in c?
I'm not going to write the code for you as it wouldn't be platform independent. However I will show you one possible technique using pseudocode. Your program will essentially be an infinite loop. In pseudocode, you would use something similar to the following: X = current_time (in seconds) repeat if X and current_time are equal sleep for 500ms otherwise let X = current_time display X (in hours, minutes and seconds) sleep for 250ms It is important that your program go to sleep for a short period to reduce the number of comparisons it needs to make and thus reduce the processing time taken up by the program. How you achieve this depends on the operating system, but you cannot use a delay loop because this would consume valuable processing time by itself. In general, the sleep function should inform the operating system to put your program into an idle state for a set period of time. When the timer has elapsed, the OS will waken your program. Thus your program will spend the majority of its time in the idle state. The sleep period should be less than a second, but must take into account the time it takes to perform the comparison and to display the results. In the code above, the program will sleep for 1/2 a second when there is no change, and 1/4 a second when there is a change. The periods can be adjusted to improve the accuracy of the watch; if they're too high, the clock may periodically jump a second, but too low and the program takes up valuable processing time doing nothing besides checking the current time. If you're only interested in hours and minutes, then both sleep periods can be increased up to 30 seconds, but for accuracy within a second or so, sleep for 1000ms.
