Question

Dużo punktów!! :)
OBOWIĄZKOWO OBLICZENIA!!
Zadania w załączniku.
Prosze o dokładne obliczenia

Answer 1

Zadanie 1

m = 2kg

s₁ = 0,8m

s₂ = 2m

W = F * Δs

F = m * g

F = 2 * 10 = 20N

W = 20 * ( 2 - 0,8 )

W = 20 * 1,2

W = 24

 

Zadanie 2

s = 1m

W = 200J

F = ?

m = ?

g = 10

W = F * s

F = m * g

W =  m * g * s

200 = m * 10 * 1 | /10

20 = m

F = 20 * 10

F = 200

 

Zadanie 3

W = F * s

W₁ = 15 * 20 = 300

W₂ = 30 * 20 = 600

W₃ = 40 * 10 = 400

300 + 600 + 400 = 1300

 

Zadanie 4

m = 30 kg

W = 750J

g = 10

s = ?

W = m * g * s

750 = 30 * 10 * s

750 = 300 * s |/300

s = 2,5

 

Zadanie 5

P = 200W

m = 200kg

h = 4m

g = 10

P = W/t = F *s/t = m * g * s/t

200 = 200 * 10 * 4 / t

200 = 8000/t |*t

200t = 8000 | /200

t = 40

 

Zadanie 6

W = ?

s = 250 m

v = 50 m/h

P = 25000W

v = s/t

50 = 250/t | *t

50t = 250 |/50

t = 5h = 18000s

25000 = W/18000 | *18000

W = 450000000J

 

Zadanie 7

P = ?

t = 3h

Q = 0,6 kWh = 600Wh

600 = P * 3 | /3

P = 200

 

Wybacz, ale do pozostałych zadań nie mam takiej pewności jak do tych.