725 Kg equals 725x9.8= 7105 N
This problem is relatively simple, in order to solve this problem the only formula you need to know is the formula for friction, which is:
<span>Ff = UsN </span>
<span>where Us is the coefficient of static friction and N is the normal force. </span>
<span>In order to get the crate moving you must first apply enough force to overcome the static friction: </span>
<span>Fapplied = Ff </span>
<span>Since Fapplied = 43 Newtons: </span>
<span>Fapplied = Ff = 43 = UsN </span>
<span>and it was given that Us = 0.11, so all you have to do is isolate N by dividing both sides by 0.11 </span>
<span>43/0.11 = N = 390.9 which is approximately 391 or C. 3.9x10^2</span>
Answer:
Displacement = 0.707A
Explanation:
To solve for the displacement we know that
Potential energy PE = 1/2Total energy (Etotal)
Therefore 1/2kx^2 = 1/2(1/2KA^2)
Solving for x we have
x^2 = √A^2/2
x = A/√2
x= 0.707A
1. H<span>aving to push a rough and heavy box across the floor to move it.
2. </span><span>The coefficient of sliding friction will decrease.
3. G</span>reater than <span>the friction involved in rolling an object.
4. D</span><span>rag.
5. S</span>liding (kinetic) friction. Sliding friction<span> is also known as </span>kinetic friction - force that is needed to keep a surface sliding<span> along another surface.</span>
Answer:
digital signals one non-obvious example of a digital signal is a hard disk. Discrete time signals are defined for a discrete set of values, like the samples of a continuous time signal, while digital signals are inherently digital, like the number that crosses a certain bridge every hour.
Explanation:
Analog signals for example, and aneroid barometer uses rotary position as the signal to conveyed by an analog signal, often such a signal is a measured response to changes in physical phenomena, such as sound, light, temperature, position, or pressure.
