What is 82kg in pounds?
2 answers:
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Answer:
Friction between the box and the floor is 25N to the left.
Explanation:
According to Newton's second law of motion, the net force acting on an object is equal to the produce between the object's mass and its acceleration:
where
m is the mass of the object
a is its acceleration
In this problem, we have two forces acting on the object:
- The applied force, F = 25 N, to the right
- The force of friction , opposing the motion of the box, so to the left
So we can write the net force as
Also, we know that the box is moving at constant speed: this means its acceleration is zero, so
Therefore
WHich means:
And therefore,
which means that the force of friction is also 25 N.
Answer:
t = 106π / 30*2.1
Explanation:
=> 106
=> 106 x 2π/60
=> 106/30π
∝ = -2.1 rad/sec²
=> 0
=
+ ∝t
∴ ( -
) / ∝ = t
t = 106π / 30*2.1