A particle is forced to meove on a straight line path. It returns to the starting point after ` 10 seconds. The total distance covered by the particle during this time is ` 20 m`. Which of the foolowing statements are true regarting the motion of the particles .

Options

A. the average velocity of the particle is zero
B. the displacement of the particle is zero
C. the average speed of the particle is `2.0 ms^(-1)`
D. the displacement of the particle is ` 20 m`.

Answer

A, B, C

Explanation

When a particle whil movign returns to its initial position after a crtain time . Then its displacemnt in tha time is zero . Its average velocity (= diosplacement / time 0 is also zero. But its average speed = (total distance travelled)/(time taken ) = ( 20) /(10) `
` 2.0 ms^(-1)`