Question

If a 75-kg runner can accelerate from standing start to a speed of 10m/s in 3 seconds, ho much power is generated?

Answer 1

show your solutions please

Answer 2

wait

Answer 3

u can first find acceleration through v=u+at ,u will get time as 10/3,then find displacement by x=(v+u)/2.t u will get displacement as 50/3 m,then work done is
W=m.a.d=75.10/3.50/3 that is 12500/3.Then power is W/t that is
P=12500/3 divided by 10/3 that is equal to 1250 watts or 1.25 kW

Answer 4

if u dont understand anything let me know and i will xplain that part again..

Answer 5

if u understand please give me a message that u hav understood

Answer 6

did you know that power=work/time

Answer 7

yeah its a formula

Answer 8

why did my teacher gave me an answer of 2450 W???

Answer 9

wait let me check my answer

Answer 10

correction displacement is 15 m,so work =75.10/3.15 that is 3750 J so power = 3750/10/3 that is 3750 divided by 3 that is equal to 1250
I am getting only 1 answer so i think u should write this down and then ask ure teacher as she might hav been wrong or else if i am wrong please let me know

Answer 11

why is the displacement 15?

Answer 12

my teacher's solution is [(735)(10)]/3

Answer 13

1250

Answer 14

why?