If you were going to describe the relationship between current, voltage, and power, you could say: (1 point) Group of answer cho
1 answer:
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Answer:
Yes it is better to pull the rope rather than push it
Explanation:
Let the force is applied at an angle of 60 degree
so we will have net vertical force on the crate is given as
here we know
now friction force on the crate is given as
Yes it is better to pull the rope rather than push it
Answer:
a) The total angle of the grinding wheel is 569.88 radians, b) The grinding wheel stop at t = 12.354 seconds, c) The deceleration experimented by the grinding wheel was 8.780 radians per square second.
Explanation:
Since the grinding wheel accelerates and decelerates at constant rate, motion can be represented by the following kinematic equations:
Where:
,
- Initial and final angular position, measured in radians.
,
- Initial and final angular speed, measured in radians per second.
- Angular acceleration, measured in radians per square second.
- Time, measured in seconds.
Likewise, the grinding wheel experiments two different regimes:
1) The grinding wheel accelerates during 2.40 seconds.
2) The grinding wheel decelerates until rest is reached.
a) The change in angular position during the Acceleration Stage can be obtained of the following expression:
If ,
and
, then:
The final angular angular speed can be found by the equation:
If ,
and
, then:
The total angle that grinding wheel did from t = 0 s and the time it stopped is:
The total angle of the grinding wheel is 569.88 radians.
b) Before finding the instant when the grinding wheel stops, it is needed to find the value of angular deceleration, which can be determined from the following kinematic expression:
The angular acceleration is now cleared:
Given that ,
and
, the angular deceleration is:
Now, the time interval of the Deceleration Phase is obtained from this formula:
If ,
and
, the time interval is:
The total time needed for the grinding wheel before stopping is:
The grinding wheel stop at t = 12.354 seconds.
c) The deceleration experimented by the grinding wheel was 8.780 radians per square second.