Belle is walking south at an average velocity of 6 km/h. How many kilometers can she walk in three hours?
1 answer:
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Using the Universal Gratitation Law, we have:
Again applying the formula in the new situation, comes:
Number 4
If you notice any mistake in my english, please let me know, because i am not native.
Again applying the formula in the new situation, comes:
Number 4
If you notice any mistake in my english, please let me know, because i am not native.
Answer:
a)
b)
c)
Explanation:
the gravitational potential energy is given by:
The kinetic energy is given by:
the initial kinetic energy is zero because the motion started from rest, so:
applying the conservation of energy theorem:
The work done by the friction force is given by:
the angle of the force is 180 degrees because it's against the movement: