Question

A car increases it's speed from 20 km per hour to 30 km per hour in 10 seconds what is it's acceleration

Answer 1

ᴜɴɪᴛ ᴏꜰ ᴀᴄᴄᴇʟᴇʀᴀᴛɪᴏɴ ɪꜱ ᴍ/ꜱ^2.

ᴀ= (ᴠ2-ᴠ1)/(ᴛ2-ᴛ1)

(ᴛ2-ᴛ1)=10 ꜱᴇᴄ

ᴠ2= 30 ᴋᴍ/ʜ = 30×5/18 = 8.33 ᴍ/ꜱ

ᴠ1= 20ᴋᴍ/ʜ = 20×5/18= 5.55 ᴍ/ꜱ

ᴀ= (8.33-5.55)/10 = 2.77 /10

ᴀ= 0.277ᴍ /ꜱ^2

ᴀ= 0.28 ᴍ/ꜱ^2