Question

what is meant by time,speed, velocity, acceleration, deceleration with example?

Answer 1

speed is total distance per unit time
velocity is total displcement per unit time
change in velocity per unit time square
us acceleration
negative acceleration is deceleration
time is the period in which these activities were done

Answer 2

Time is a period when activities are done.
Speed is the distance covered / time taken.
velocity is rate of speed / time.
acceleration is velocity / time.
deceleration is negative acceleration