Four cracks per second. With the information given in the question, it's not possible to determine a true 'speed' because no distance information is given. If the cracks were 3-ft apart, then his speed was 12 ft per second, or about 8.2 mph. But this is only an example. It can't be assumed, since sidewalk blocks are not standard throughout the US. In general, if 'B' is the length of the sidewalk blocks, then the skater's speed was == 4Bfeet per second == 2.72B miles per hour
The average velocity has two parts to it: The average speed and the average direction. The average speed is: (the distance you travel between 0 and 3 seconds) divided by (3). The average direction is: the direction from (the place where you started at 0 seconds) to (the place where you finished at 3 seconds).
It is 20 seconds.
12 years = 144 months = about 626 weeks = about 4383 days on average = about 105,190 hours on average = about 6,311,390 minutes on average = 378,683,424 seconds on average (not counting leap seconds)
what is the change in speed or velocity? average acceleration will be change in speed or velocity divided by time taken (4 seconds in ur case)
Since two runners finished in 80 seconds, the average of 80, 80, 72, and 68 must be found. This average is ? seconds. ANS IS 75No it is 73.333333 actually It's 75 even. Add all Four times Divide by four and you have you average.
A penny dropped from the top of a skyscraper would reach the ground in approximately 9.2 seconds. A passerby on the sidewalk below would have less than 9 seconds to move out of the way once they see the penny falling.
True
The average velocity has two parts to it: The average speed and the average direction. The average speed is: (the distance you travel between 0 and 3 seconds) divided by (3). The average direction is: the direction from (the place where you started at 0 seconds) to (the place where you finished at 3 seconds).
It is 20 seconds.
2.6
true
9.95 seconds to 10.3 seconds
For a 50meter race, i got 14.93 seconds but the average i would say is 16 seconds.
The average lifespan in the US is 78.4 years, which is 41,235,264 minutes, or 2,474,115,840 seconds.
30 seconds...
12 years = 144 months = about 626 weeks = about 4383 days on average = about 105,190 hours on average = about 6,311,390 minutes on average = 378,683,424 seconds on average (not counting leap seconds)
7.2 seconds is the average for the 1000 point club, but average would be about 7.6