answer me plssss .....
Attachments:
Answers
Answered by
1
1. Average speed = Total distance / Total time taken
= S1 + S2/t1 + t2
S1 = 10km
= 10*1000 = 10000m
S2 = 10km
= 10000m
t1 = 20min
=20*60 = 1200sec
t2 = 30 min
= 30*60 = 1800sec
Average speed = 10000 + 10000/1200 + 1800
=20000/3000
= 6.67m/s
2.
we can use the formula 2xy/x + y
so,
2 x 20 x 30/ 20 + 30
12000 / 50
= 240 km/hr
Rythm14:
and i already answered your 3rd que
ok
but the answer for 2nd. one is 24km\h
ok let me check
I think u asked for 3 rd na??
im getting 240 not 24
for which question
2nd
acha k
Answered by
3
Answer:
v = 0
u= 54km/hr=15m/s
s= 20 m
v^2 - u^2 = 2as
0^2 - 15^2 =2 x a x20
0 - 225=40a
-225/40=a
-5.625m/s^2=acceleration
It was a de-acceleration or retardation bcoz the answer is negative
plz mark me brainliest
Similar questions