Question

A body moves along a straight line with acceleration 3 m/sec2

for 2 seconds and then with

acceleration 4 m/sec2

for 3 sec. What is the average acceleration.​

Answer 1

avg acceleration= total speed/total time

= 3 + 4 /3+2

7/5

=1.4ms-2

hope it helps you but please do cross check with others

Answer 2

Answer:

Explanation:

initial vel:50m/s2    final vel:?  acc:10m/s   time:4sec

fina vel= initial vel acc x time

= 50+ 10 x 4

50+40= 90m/s

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