Question

A truck starts from rest and rolls down a hill with a constant acceleration. it travels a distance of 400min 20s. find it's acceleration.find the force acting on it if its mass is 7 tonnes.1 tonne =1000kg

Answer 1

From the equation,
s = ut+(1/2)at²
u = 0
s= 400 m
t= 20 sec
⇒400 = (1/2) a×(20)²
⇒800 = 400 a
⇒a = 2 m/s²
1 tonne = 1000 kg
so, 7 tonnes = 7000 kg
F = ma = 7000×2 = 14000 N

Answer 2

☺ Hello mate__ ❤

◾◾here is your answer...

u = 0 m/s

t = 20 s

s = 400 m

According to the second equation of motion:

s = ut + 1/2 at^2

400 = 0 + 1/2 × a × (20)^2

a = (400 × 2 )/400 = 2m/s^2

7 metric tons = 7000 kg

Now,

Force = mass × acceleration

⇒ F= 7000 × 2 = 14000 N

I hope, this will help you.

Thank you______❤

✿┅═══❁✿ Be Brainly✿❁═══┅✿