Answer:
The answer is 156.5N.
This problem involves the application of newtons third law of motion and the knowledge of frictional forces. The law which states that action and reaction are equal and opposite.
Explanation:
The approach to solving this problem draws the diagram that vonnects the three crates and sections the interconnection surface as can be seen below. The force of friction acts on each of the crates and is equal to uR where R is the reaction force of the ground on each of the crates.
32cm/s = 0.32m/s = 0.00032km/s
Answer:
heart rate increases during activity
Explanation:
You can work at 70 to 85 percent of your maximum heart rate during vigorous activity.
I believe it means that the quantity is not being used. to conserve means to save something or protect it, so it would make sense if the quantity is being saved up.
Answer:
F = 84.61 N
Explanation:
As in the figure, since there is no friction so if component of Force applied along the incline is greater than the component of weight along the incline, then the object will move up the incline.
component of Force along the incline = F cos(23° - 15°) = F cos(8°)
component of weight along the incline = 33*g*sin(15°) = 33*9.81*sin(15°)
Equating the above two components of forces will give the minimum Force required.
F cos(8°) = 33*9.81*sin(15°)
F = 33*9.81*sin(15°) / cos(8°) (calculate the value using a scientific calculator)
<u>F = 84.61 N</u>