18.
Which of the following is incorrect for an object in motion?
a. Displacement is always greater the distance travelled
b. Displacement can be equal to or less than distance travelled
c. None of the above
d. Both a and b
Answers
Option A-
Distance is scalar quantity it cannot be negative and can not be zero for a moving body. So, it is the correct statement.
Option B-
Displacement is a vector quantity, so the value of displacement can be positive, zero or negative. So, it is also the correct statement.
Option C-
We know that displacement is the shortest distance between two points, which is unique. So, it is also a correct statement.
Option D-
Displacement a vector quantity whose magnitude is equal to the shortest distance between the initial and final points so it can not be greater than the distance. So, Option -D is the incorrect statement.
Therefore, D is the correct option.
Answer:
a is a worng answer
because displacement is always less than distance
because displacement is the shortest distance between position