The force of friction is 19.1 N
Explanation:
According to Newton's second law, the net force acting on the bag is equal to the product between its mass and its acceleration:
where
is the net force
m is the mass
a is the acceleration
The bag is moving at constant speed, so its acceleration is zero:
Therefore the net force is zero as well:
Here we are interested only in the forces acting along the horizontal direction, therefore the net force is given by:
where
is the horizontal component of the applied force, with
F = 22.5 N
is the force of friction
And solving for , we find
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Answer:
0.456033049
Explanation:
where N=mg hence
where m is mass of object, g is acceleration due to gravity whose value is taken as
,
is the coefficient of static friction and F is the applied force.
Making the subject we obtain
and substituting m for 38 Kg, g for
and 170 N for F we obtain
Therefore, the coefficient of static friction is 0.456033049
Answer:
Ratio of length will be
Explanation:
We have given time period of the pendulum when length is is
And when length is time period
We know that time period is given by
So ----eqn 1
And -------eqn 2
Dividing eqn 2 by eqn 1
Squaring both side
Answer:
Fc = 7.14N
Explanation:
First of all, let's convert everything to the same unit system:
m = 0.0031kg R = 13.1cm * 1m / 100cm = 0.131m
ω = 50000 rev/min * 1rev /( 2π rad ) * 1min / 60s = 132.63 rad/s
Now we can calculate centripetal force as:
Replacing the values we get the answer:
Fc = 7.14N
Answer:
The wife have to sit at 0.46 L from the middle point of the seesaw.
Explanation:
We need to make a sketch of the seesaw and the loads acting over it.
And by the studying of the Newton's law we can find the equation useful to find the distance of the mother sitting on the seesaw with respect to the center ot the pivot point.
A logical intuition will give us the idea that the mother will be on the side of her son to make the balance.
The maximum momentum with respect to the pivot point (0) will be:
Where L/2 is the half of the distance of the seesaw
Therefore the other loads ( mom + son) must be create a momentum equal to the maximum momentum.
