Question

7. A loaded truck starts from rest and rolls down a hilly road with a constant acceleration. The truck travel
distance of 1 km in 60 s. What is its acceleration? Find the magnitude of net force acting on the truck if its mass
is 7200 kg.​

Answer 1

Answer:

2000 N

Explanation:

v = 1000/60 = 100/6 = 50/3 m/s

v = u +at

50/3 = 0 + a(60)

a = 5/18 m/s2

F = ma = 7200 x 5/18

= 400*5

= 20,00 N

Answer 2

Answer:4000N-s

Explanation:

s=ut+1/2at2

1000=0+60a/2

1000=3600/2

1000=1800a

a=5/9=0.5555555m/s2

F= ma = 7200×5/9=4000N