What is meant by the term acceleration? Write its SI unit.
Write difference between 'distance' and 'displacement"
Under what conditions can a body travel a certain distance and yet its
resultant displacement be zero.
Is a uniform circular motion accelerated? Explain.
What type of motion is exhibited by a free falling body & why?
Answers
Answer:
Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.
DIFFERENCE= distance is how far away something has travelled from another object, while displacement is how far something is from the other object. Displacement is a vector quantity, unlike distance.
CONDITIONS= A body travel a certain distance and yet its resultant displacement by zero when the body comes back to its starting point.
Uniform circular motion is accelerated because the velocity changes due to continuous change in the direction of motion. So, even when the body moves ta a constant speed, its velocity is not constant. ... Therefore circular motion is an acceleration motion even when the speed remains constant.
The motion of a freely falling body is an example of uniformly accelerated motion.as due to the gravitational pull of the earth the body covers equal amount of velocity in equal intervals of time. In another case a ball is thrown from the highest distance and it is probable that it is non uniform motion .
Explanation:
the term acceleration is the rate of change of velocity with time . its SI unit is m/s^2
Distance : It is the actual path travelled by an object from its initial position to final position. It is a scalar quantity.
Displacement : It is the shortest straight line path between initial and final position.
If the initial and final points are same then displacement will be zero.
Distance is always greater than or equal to displacement.
If the initial and final points are same then displacement will be zero. Then, a body can travel a certain distance.
The motion is non-uniform but a freely falling body is uniformly accelerated because while falling it is not covering the equal amount of distance at equal intervals.