HELP I RLLY NEED HELP WITH THIS PLEASE HELP ME WHAT IS PHYSICAL SCIENCE ANYBODY???
1 answer:
You might be interested in
Answer:
Explanation:
Weight of the ladder is 355N
WL = 355N
The weight of the ladder acts at center of the ladder I.e at 4m from the bottom
Weight of firefighters is 870N
Wf = 870N
The fire fighter is at 6.3m from the bottom of the ladder.
N1 is the normal force exerted by the wall
N2 is the normal force exerted by the ground
Using Newton law
Check attachment
ΣFy = 0, since body is in equilibrium
N₂ - WL - Wf = 0
N₂ = WL + Wf
N₂ = 870 + 355
N₂ = 1225 N
This the normal force exerted by the ground on the wall.
Now to get N₁, let take moment about point A
So, before we take the moment we need to make sure that the forces are perpendicular to the plane(ladder), we need to resolve the weight of the ladder, firefighter and the normal of the wall to be perpendicular to the plane.
ΣMa = 0
Clockwise moment is equal to anti-clockwise moment
Moment Is the produce of force and perpendicular distance.
M = F×r
So,
WL•Cos50 × 4 + Wf•Cos50 × 6.3 —N₁•Sin50 × 8 = 0
355•Cos50 × 4 + 870•Cos50 × 6.3 =
N₁•Sin50 × 8
1825.52 + 3523.12 = 6.13N₁
6.13N₁ = 5348.64
N₁ = 5348.64/6.13
N₁ = 872.54 N.
The normal force exerted by the wall is 872.54N
1) 0.266 H
2) 0.040 J
3)
Explanation:
The diagram of the circuit is missing: find it in attachment.
1) What is L, the value of the inductance of the circuit?
For an RLC circuit, the resonant angular frequency is given by:
where
L is the inductance of the circuit
C is the capacitance of the circuit
In this problem, we have:
is the angular frequency of the generator, at which the circuit is in resonance
is the capacitance
Therefore, solving for L, we find the inductance of the circuit:
2) What is umax,c, the value of the maximum energy stored in the capacitor during one cycle
The maximum energy stored in a capacitor is given by the equation
where
C is the capacitance of the capacitor
V is the maximum potential difference across the capacitor
Here we have:
is the capacitance
is the maximum voltage across the capacitor, which is the emf of the generator
Substituting, we find:
3) What is R, the value of the resistance of the circuit?
Here we want to find the resistance of the circuit.
The resistance of the circuit can be found by using Ohm's Law:
where
V is the maximum voltage
R is the resistance
I is the maximum current
Here we have:
V = 24 V is the maximum voltage provided by the generator
I = 0.78 A is the maximum current in the circuit
Solving for R, we find the resistance:
