It’s 9.8 use a calculator
Up wards because I’m not sure
Just use algebra to rearrange the terms so for s=1/2at^2 and solving for a we get 2s=at^2 so 2s/t^2=a
solving s=1/2at^2 for t gives 2s=at^2 which leads to 2s/a=t^2 so t=sqrt(2s/a)
filling in the numbers for 3 since a = 2s/t^2 we get a= (2(20.5m))/5s^2 =1.64m/s^2 the correct units in the answer indicate a possible correct answer since the units of acceleration are m/s^2.
4. using the value for a from question 3 and using 42.5 meters for s and solving for t we get sqrt((2s)/a) = sqrt((2*42.5m)/1.64m/s^2)= approximately 7.2s you can see the m's cancel and you are left s^2 as the units and the sqrt(s^2) = s so again the correct units indicate that 7.2s is probably correct. (These answers ARE correct though). checking the units gives a kinda quick assurance you are on the right path.
Answer:
athlete trains 115 minutes in 6 days to get a total of 690 minutes in all.
Step-by-step explanation:
115m = An athlete trains per day
690m = total minutes of athlete’s training
d = number of days
=> 115(d) = 690
=> 690 / 115 = 6
=> 115 (6) = 690
d = 6
Answer:
Step-by-step explanation: