Niels Bohr discovered of the nucleus and developed an atomic model
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Horizontal motion is defined as a projectile motion in a horizontal plane depending upon the force acting on it. For a short distance, the vertical and horizontal components of a projectile are perpendicular and independent of each other.
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.
Answer:
2 and 4
Explanation:
3 is new so 2 and 4 is Cresent