Answer:
Energy Flows Quick check answers:
1. Ffd.
2. The kinetic energy decreases, and gravitational potential energy increases.
3. The internal energy of the system increases.
4. KEbox= Etotal-mgh
5. Etotal = 1/2m1(v1)^2+1/2m^2(v2)^2+U
Explanation:
The magnitude of the net force can be found with Pythagorean theorem.
F² = Fx² + Fy²
F² = (1.06 N)² + (9.37 N)²
F = 9.43 N
The direction can be found with trigonometry (measured from the -y axis):
θ = atan(Fx / Fy)
θ = atan(1.06 / 9.37)
θ = 6.45°
Answer:
90.6 A
Explanation:
From ohm's law,
V = IR.................... Equation 1
Where V = Voltage of the source, I = current through the person, R = Total resistance
Make I the subject of the equation,
I = V/R............... Equation 2
From the question,
R = Resistance of the appliance + Resistance of the skin
R = 2552+96 = 2648 ohms.
Given:
V = 240 V, R = 2648 Ω
Substitute into equation 2
I = 240/2648
I = 0.0906 A
I = 90.6 mA.
Hence the current through the person = 90.6 A.
