Question

a truck starts from rest and Rolls down a hill with a constant acceleration it travels a distance of 400 m in 20 second find its acceleration find the force acting on it if the mass of the truck is 7 metric ton

Answer 1

Given, Initial velocity of truck (u) =0 (Since, truck starts from rest) 

Distance travelled, s = 400 m

Time (t) = 20 s

Acceleration (a) = ?

We know that, 

NOTE:- (Check this attachment)

Force acting upon truck: 

Given mass of truck = 7 ton = 7 X 1000 kg = 7000 kg

We know that, force, P = m x a

Therefore, P = 7000 kg x 2 m s - 2
Or, P = 14000 Newton

Thus, Acceleration = 2 m s - 2 and force acting upon truck in the given condition = 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✿❁═══┅✿