Answer:
The graph C.
Explanation:
The potential energy of the book is maximum when it is on the table; therefore, <em>the graph we are looking for must have maximum potential energy at </em>
Also, as the book falls down, its potential energy is decreasing; therefore, <em>the slope of the graph must be negative. </em>
Finally, as the book lands on the ground, its potential energy becomes zero; <em>therefore, the graph must show potential energy of zero at some time, i.e it must contain a point </em>
Now, looking at the four graphs given, we see that the graph C satisfies all our conditions, and therefore it is the correct choice.
For the sake of completeness, let us look at other choices.
<em>Graph A shows potential energy non linearly increasing—not true for a falling book.</em>
<em>Graph B shows potential energy increasing linearly—not true for a falling book because its potential energy is decreasing.</em>
<em>Graph D shows that potential energy of the book does not change—cannot be true since the book is falling.</em>
Answer: g= 9,81 m/s^2 ( average value for g in the Earth)
Explanation: The value of g depend on the localization on the Earth for example at the poles g is equal to: 9.83 m/s^2
On the other hand, at the aquator g=9.78 m/s^2
Answer:
32.087 m/s
Explanation:
Velocity Initial = 5.6 m/s
time= 2.7
acceleration = 9.81
Velocity final = ?
Vf = Vi + at
Vf = (5.6) + (9.81)(2.7)
Vf = 32.087 m/s
Answer: demesne lands
Explanation:
" (demesne lands) which were for the personal use of the lord of the manor."
Answer:
Distance = 13.9 meters
Explanation:
Given the following data;
Maximum speed = 150 km/hr to meters per seconds = 150 * 1000/3600 = 41.67 m/s
Decelerating speed = 3m/s
To find the distance travelled with this speed;
Distance = maximum speed/decelerating speed
Distance = 41.67/3
Distance = 13.9 meters
Therefore, the bus would travel a distance of 13.9 meters before stopping.