Answer the correct letter, i need only the correct answer 4) A body that moves at constant speed may have zero acceleration when A) it is coming to a stop; B) its direction does not change; C) it slows down; D) a force halts its motion. 5)An example of an object whose motion is not accelerating is a car that A) turns around the corner at a constant speed of 20 kph; B) descends a hill at a constant speed of 20 mph; C) climbs a ramp at a decreasing speed; D) speeds up from rest on a level road. 6) What happens when a body fall? A) Its velocity increases. B) Its acceleration increases. C) The force acting on it decreases. D) Its speed remains the same.
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
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