A girl is sitting in a sled sliding horizontally along some snow (there is friction present).
1 answer:
Answer:
159 N
Explanation:
There are two types of force of friction:
- Static friction: this is the force of friction that occurs when the object is at rest
- Kinetic friction: this is the force of friction that occurs when the object is in motion
In this problem, the girl is sitting on the sled, and the sled is sliding: this means that the object is in motion, therefore the force of friction that we have to calculate in this problem is the force of kinetic friction.
The force of kinetic friction acting on an object sliding over a flat surface is given by
where
is the coefficient of kinetic friction
N is the normal force on the object
In this problem:
N = 636 N
Therefore, the force of kinetic friction is
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The time of motion of the 5 kg object will be the same as 1 kg since both objects are dropped from the same height.
The given parameters;
<em>Mass of the first object, m1 = 1 kg</em>
<em>Mass of the second object, m2 = 5 kg</em>
The final velocity of the objects during the downward motion is calculated as follows;
The time of motion of the object from the given height is calculated as;
The time of motion of each object is independent of mass of the object.
Thus, the time of motion of the 5 kg object will be the same as 1 kg since both objects are dropped from the same height.
Learn more about time of motion here: brainly.com/question/2364404