Question

a truck starting from rest and rolls down on a hill with a constant acceleration it travels a distance of 400 m in 20 seconds find its acceleration find the force acting on it of it is if it is mass is equal to 700 kg

Answer 1

heya mate!!!

answer:

_______________________________________________________

The truck starts from rest, so initial velocity = 0

Distance travelled = 400 m

Time taken = 20 s

We know the equation of motion, S = ut + ½ at2

400 = 0 + ½ a * (20)2

a = 2 m/s2

Now, mass = 7 metric tonnes

= 7 * 1000

= 7000 kg

So force = mass * acceleration

F = 7000 * 2

=14000N

_______________________________________________________

hope it helps u !!!

#bebrainly

Answer 2

heya...!!!

✔here is ua answer:

___________________________________________________________________________❤

Initial velocity of the truck, u = 0 m/s 

Time taken, t = 20 s 

Distance covered by the stone, s = 400 m 

According to the second equation of motion: 

s = ut + 1/ 2 at 2 

We have 

400 = 0 × 20 + 1 /2 × × (20) 2 

⇒ 400 = 200 

⇒ = 2 m/s2 

Now, Force = mass × acceleration 

⇒ F = 700 × 2 = 14000 N

hope it helps...!!❤