Question

PLEASE answer this question PLEASE i will mark u as brainlist​

Answer 1

See the pic and speed is 20m/s at t = 4sec. Not in 4th sec

4th sec means time interval btwn t=3sec and t-4sec. That mean time interval of 1 sec

Speed is variable here so how can it be const. in 4th sec. Hope u clear on t=4sec and 4th second

Hope It's Helpful For U...☺

Answer 2

Answer:

76~55-7 velocity-79⁵⁶ because change its substance