Answer:
L=55.9m
Explanation:
The equation for the period of a simple pendulum is:
In our case what we know is the period and the acceleration of gravity, and we need to know the length of the pendulum, so we can write:
Which for our values is:
Answer: C
Explanation:
The forces at play, are gravity (which is pointing down[g]) and air resistance(which is pointing up [R]). The net force is [F] is
F = g + (-R) if we choose down as +tive and up as -tive.
Since the skydiver IS falling, it means g is bigger than F, since gi si responsible for pulling down, and this then confirms that the net force will then be pointing downwards.
Answer:
Explanation:
Given that
There's a change in friction from 440 kJ to 110 kJ
This change is as a result of conversion of energy. The energy of the car system converted the mechanical energy in it, into a corresponding heat energy. During the course of this conversion, is where a whopping 330 kJ of energy went missing.
The 330 kJ of energy was lost as a result of the conversion of mechanical energy into heat energy by the use of friction.
