Recent content by elton_fan

Homework Statement In a 100 m race, Maggie and Judy cross the finish line at the same time, both taking 10.2 s. Accelerating uniformly, Maggie takes 2.00 s and Judy 3.00 s to attain maximum speed, which they maintain for the rest of the race. What is the acceleration of each sprinter...

the problem is a sprinter accelerates from rest to a top speed with an acceleration whose magnitude is 3.8 m/s². after achieving top speed . he runs the remainder of the race without speeding up or slowing down. the total race is 50 meters long. if the total race is run in 7.88s how far does he...

thanks but could you please try to explain to me the first exercise

i just want to know what does these problems mean exactly: first: an experimental vehicle slows down and comes to a halt with an acceleration whose manitude is 9.80m/s². after reversing direction in a negligible amount of time, the vehicle speeds up with an acceleration of 9.80 m/s². other...

thanks a lot

a runner runs half the remaining distance to the finish line every ten seconds. she runs in a straight line and doesn't ever reverse her direction. does her acceleration have a constant magnitude? give a reason for your answer i want just to know the situation

i think average velocity is a vector since it can be positive or negative right

hello, could you please tell me if the velocity is the average speed a vector or scalar quantity? thanks a lot

hi all i need a derivative of this function f(t)=100t/2t+15 thanks a lot

thanks a lot i understand now

so for example what would be the answer of this question? i think it's yes it's true

i would like to ask a question about what does quantities and dimension mean in this sentence is it possible for two quantities to have the same dimensions but different units? thanks a lot in advance

it's a greatest integer function

no sorry isn't an absolute value is a step function

second one. sorry don't be very furious since I'm new to the forum N(t)=25(2|\frac{t+2}{2}|-t)