Let the bigger sphere be sphere 1 and the let the smaller sphere be sphere 2. Rest of the answer is in the picture.
When a force of 15 newtons is applied to a stationary chair, it starts moving. What can you say about the frictional force betwe
2 answers:
Answer:
That the maximum static frictional force is 15 N
Explanation:
The static frictional force is the force of friction that acts on an object at rest on a surface, when the object is pushed by an external force. The static frictional force acts in the opposite direction to the external force, preventing the object to start moving unless the external force overcomes it.
Due to its nature, the magnitude of the static frictional force varies between zero (if no external force is applied) to a maximum value, defined as
where is the coefficient of static friction, m is the mass of the object and g is the acceleration due to gravity.
The object starts to move only when the magnitude of the external force becomes larger than the maximum value of the static frictional force. In this problem, this happens when the external force is 15 N, so we can say that the maximum value of the static frictional force is 15 N.
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Answer:
a) t = 19.6 s, b) fr = 1.274 10⁴ N
Explanation:
This is a Newton's second law problem
Y Axis
for the cabin
N₁-W₁ = 0
N₁ = W₁
for the trailer
N₂- W₂ = 0
N₂ = W₂
X axis
for the cabin plus trailer, where friction is only in the cabin
fr = (m₁ + m₂) a
the friction force equation is
fr = μ N
we substitute
μ N₁ = (m₁ + m₂) a
μ m₁ g = (m₁ + m₂) a
a = μ g
let's calculate
a = 0.65 9.8
a = 1,274 m / s²
a) to find the stopping distance we can use kinematics
Let's slow down the sI system
v₀ = 90 km / h (1000 m / 1km) (1h / 3600s) = 25 m / s
v = v₀ - a t
when it is stopped its speed is zero
0 = v₀ - at
t = v₀ / a
t = 25 / 1.274
t = 19.6 s
b) the friction force is
fr = 0.65 2000 9.8
fr = 1.274 10⁴ N
This is the braking force and also the forces that couple the cars.
Complete Question
An L-C circuit has an inductance of 0.350 H and a capacitance of 0.290 nF . During the current oscillations, the maximum current in the inductor is 2.00 A .
What is the maximum energy stored in the capacitor at any time during the current oscillations?
Express your answer in joules.
Answer:
The value is
Explanation:
From the question we are told that
The inductance is
The capacitance is
The current is
Generally the maximum energy is mathematically represented as
=>
=>