15 × 2 = 30 ÷ 3 = 10. Hope this helps.
Answer:
a = 120 m/s²
Explanation:
We apply Newton's second law in the x direction:
∑Fₓ = m*a Formula (1)
Known data
Where:
∑Fₓ: Algebraic sum of forces in the x direction
F: Force in Newtons (N)
m: mass (kg)
a: acceleration of the block (m/s²)
F = 1200N
m = 10 kg
Problem development
We replace the known data in formula (1)
1200 = 10*a
a = 1200/10
a = 120 m/s²
M g = 5.00 (9.81) = 49.05
sin 21 = x149.05
x = 17.6N
(a) The electrical resistance of the wire is determined as 9.27 x 10⁻⁴ ohms.
(b) The current flowing through the wire is 1.1 mA.
<h3>
Electrical resistance of the wire</h3>
The electrical resistance of the wire is determined as follows;
ρ = RA/l
RA = ρL
R = ρL/A
Where;
- A is area of the iron bar
- ρ is electrical resistivity = 1/conductivity = 1/1.0299 x 10⁷ = 9.7 x 10⁻⁸
A = πd²/4
A = π x (0.02)²/4
A = 3.14 x 10⁻⁴ m²
R = (9.7 x 10⁻⁸ x 3)/(3.14 x 10⁻⁴)
R = 9.27 x 10⁻⁴ ohms
<h3>From the chart, voltage after 120 minutes ≈ 1.1 V</h3>
Current, I = V/R
where;
I = 1.1/(1000)
I = 1.1 mA
Learn more about resistance here: brainly.com/question/17563681
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