Section D
2 nefine the following: a) Displacement,) acceleration, c) Circular motion
(ii) Write two differences between Speed and velocity.
Answers
a) The shortest distance between the initial position and final position of the object is called the Displacement of that moving object .
b) Acceleration is the rate of change in velocity
Acceleration is equal to final velocity minus initial velocity divided by time .
c) When an object moves on a circular path then its motion is said to be circular motion .
d)
Speed
i) Speed is a scalar quantity.
ii) It cannot be zero for a moving object and cannot be negative also.
Velocity
i) Velocity is a vector quantity .
ii)It can be zero or it can also be negative for a moving object.
Answer:
a) The shortest Distance from the initial point to the final point.
b) Acceleration is the rate of change of velocity of an object with respect to time.
c) Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path.
ii)1. Speed refers to the distance covered by an object in unit time
Velocity refers to the displacement of the object in unit time.
2.Speed-Scalar quantity
Velocity- Vector Quantity