A 2-kg object is moving horizontally with a speed of 4 m/s. How much net force is required
to keep the object moving at this speed and in this direction? Explain.
Answers
A body moving horizontally with an acceleration in vertical direction is possible in a projectile motion. Yes, for e.g. in a circular motion if one is moving with a constant speed, the motion is still said to be accelerated motion as the dirction of velocity changes at every point of the path.The accelerated motion is a motion with a continually increasing velocity. Uniformly extended movement is motion with a regular, uniform change in speed.Therefore, at a constant speed (meaning no change in the magnitude of the velocity) an object could be changing its direction, and thus, accelerating. On the other hand, a constant velocity means no change in velocity (both magnitude and direction), so in this case the acceleration must be zero (no acceleration).