Answer:
Option A. 0.36 m/s to the left
Explanation:
From the question given above, the following data were obtained:
Force resistance (Fᵣ) = 55.2 N
Applied force (Fₐ) = 31.8 N
Mass (m) = 65.2 kg.
Acceleration (a) =?
Next, we shall determine the net force acting on the skateboarder. This can be obtained as illustrated below:
Force resistance (Fᵣ) = 55.2 N
Applied force (Fₐ) = 31.8 N
Net force (Fₙ) =?
Fₙ = Fᵣ – Fₐ
Fₙ = 55.2 – 31.8
Fₙ = 23.4 N to the left
Finally, we shall determine the acceleration of the skateboarder. This can be obtained as follow:
Mass (m) = 65.2 kg.
Net force (Fₙ) = 23.4 N to the left
Acceleration (a) =?
F = ma
23.4 = 65.2 × a
Divide both side by 65.2
a = 23.4 / 65.2
a = 0.36 m/s
Since the net force acting on the skateboarder is to the left. Therefore, the acceleration of the stakeholder will also be towards the left (i.e 0.36 m/s to the left)
In regards to this question, there are no options provided to choose from and so this question has to be answered based on personal knowledge. If we double only the amplitude of a vibrating ideal mass and spring system, the mechanical energy of the system will simply increase by a factor that is equal to 4.
A) Equivalent Resistance= (1/25+1/55+1/75)^-1=14.0ohms(3s.f.)
b) Current=9.0V/14.0=0.644A(3s.f.)
c) Current through 25-resistor=9/25=0.360A
Current through 55-resistor=9/55=0.164A
Current through 75-resistor=9/75=0.120A
All answers are rounded off to 3 significant figures
Answer:
F = 580.75 N
Explanation:
The force can be calculated through the following formula:
where,
F = Force = ?
P = Pressure = (72 mm Hg)(133.322 Pa/1 mm Hg) = 9599.18 Pa
A = Area = (605 cm²)(1 m²/10⁴ cm²) = 0.0605 m²
Therefore,
<u>F = 580.75 N</u>
