Question

average speed of particle in time interval t=o to t=8 sec​

Answer 1

$option : (1) \: zero$

Explanation:

$we \: \: know \: \: \boxed{average \: \: speed = \frac{total \: \: distance }{total \: \: time} } \\ Now, \: \: \: \: average \: \: speed = \frac{10 \: m+ 0 \: m +10 \: m- 20 \: m}{2s + 2 s+ 2s + 2s} \\ = \frac{0 \: m}{8s} \\ \: \: \: \: \: \: \: \: = \boxed{0 \: m {s}^{ - 1} }$