Answer :
Therefore, only when kinetic energy reaches 521.42J, the cylinder will halt.
What is speed in physics and its unit?
As a result, the fundamental unit of time and the basic unit of distance are combined to form the SI unit of speed. Thus, the metre per second (m/s) is the SI unit of speed. the speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Given that it only has a direction and no magnitude, speed is a scalar quantity.
What is speed in law of motion?
We must use our imagination to comprehend the significance of its pace at any given time. We calculate the distance the object would go if it were designed to continue moving at the same speed as it was at the relevant instant for a full unit of time, say 1 second. Then, this distance per second is its speed.
Breifing:
A rolling object's combined linear & rotational kinetic energies make up its total kinetic energy:
KE=1/2 mv²
Kinetic energy is now provided by:
Kt=1/2mv²=1/2(31.0kg)(5.8m/s)²= 521.42 J
KE=521.42J
Therefore, it takes 521.42J of kinetic energy to stop a solid cylinder from rolling across a horizontal surface at a speed of 5.8m/s without slipping.
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