Question

a truck initially moving with the speed of 50 km per hour accelerates and moves with the speed of 70 km per hour after 10 seconds calculate the acceleration of the truck

Answer 1

here u = 50km/h

50×5/18 = 13.8m/s

v = 70km/h

70×5/18 = 19.4

so a =( v - u)t

a =( 19.4-13.8)10

a = 0.56m/s

Answer 2

HEYA!!!!

YOUR ANSWER:
$u = 50km \: per \: hr \\ = (50 \times 1000) \div 3600 \\ =250 \div 18$

$v= 70km \: per \: hr \\ = (70 \times 1000) \div 3600 \\ = 350 \div 18$

$t = 10s$

$a = (v - u) \div t \\ = 5.5 \: s$

HOPE IT HELP!!!!!