here tension in the string is counter balanced by weight of block of mass m1
so we can say
now on the other side the block which is placed on the inclined plane
we can say that component of weight of the block and friction force is counter balanced by tension force
now we can plug in all values to find the friction force
so it will have 0.83 N force on it due to friction
now to find the friction coefficient
here we know that
now from above equation
so friction coefficient will be 0.38
I believe the answer is A.
Answer:
They would be at where they are for hours after.
Explanation:
Although the motion of the water is appearing to be traveling East, making Johnny think that the wave is actually pushing on the boat East bound, what is really happening here is that the motion of the particles of water is actually moving up and down that propagate to the East. Therefore, the wave would only be pushing the boat up and down, not toward land.
Answer:
A. 243 N
Explanation:
Friction is the force that opposes the relative motion between systems that are in contact.
This friction force that opposes the motion of the oak chest across the oak surface will be equal and opposite to that exerted by the woman.
First find the normal force which is the force that would point directly upwards to support weight of the block.
Normal force, N= mg where m is the mass of the chest and g is the acceleration due to gravity.
Given m=40 kg and g=9.80 m/s²
N force=40×9.80 =392N
Then find the force of friction which is given by the formula;
<em>F=μN where μ is friction coefficient for the oak chest and N is the normal force on the chest</em>
Given <em>μ</em>=0.620 and N force = 392 N then it will be;
F=0.620× 392 =243.04 N
Answer : 243 N