During an interval T, a particle moving on a straight line has average speed 30 m s⁻¹ and average velocity +18 m s⁻¹. The total distance travelled in the negative x-direction is:
Options

Question

During an interval T, a particle moving on a straight line has average speed 30 m s⁻¹ and average velocity +18 m s⁻¹. The total distance travelled in the negative x-direction is:

G1 Physics · Accepted Answer

Let P be distance travelled in +x and N in −x. P+N = 30T, P−N = 18T. Subtracting, 2N = 12T ⇒ N = 6T m.