Increase because friction would decrease.
Coating the ramp with a smoother surface will decrease the friction. A decrease in friction will help to slide any object up the ramp easily. Thus, a lesser energy will be spent as compare to earlier. Hence, the ramp's efficiency will increase.
1s as long as the height remains the same the time will be the same
According to Newtons 3rd law of Motion, for every action, there is an equal and opposite reaction. So if the boy is pushing forward on a crate with a force of 100 newtons, the crate is pushing back on the boy with a force of 100 newtons. Hope this helps
The rate at which the location of an object shifts in any direction. Speed is measured as the ratio of the distance travelled to the time it took to cover that distance. Speed is a scalar quantity since it just has a direction and no magnitude.
<h3>Explain about the speed?</h3>
It speaks of the motion of an object. Speed is calculated as distance travelled divided by time. Speed is measured in m/sec. Speed is a scalar quantity equal to the magnitude of the velocity vector. When a thing's speed is higher, it moves more quickly.
Speed refers to the rate at which a distance varies over time. It has a time-distance dimension. As a result, the SI unit of speed is created by combining the basic units of time and distance. As a result, the SI unit of speed is the meter per second (m/s)
The formula for an object's general speed is [Speed = Distance Time]. M/s is the SI unit of speed.
To learn more about speed refer to:
brainly.com/question/13943409
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