Question

A truck starts from rest and rolles down a hill with constant acceleration it travels a distance of 400m in 2sec. find the acceleration find the force acting on it. if it's mass 7 tanel​

Answer 1

Explanation:

u=0

t=2s

s=400m

s=ut+1/2at^2

400=0*2+1/2*a*(2)^2

400=0+1/2*4a

400=2a

a=200m/s^2

f=m*a

f=7000*200(1 ton =1000kg)

f=1400000 Newton

Answer 2

Correct Question:

A truck starts from rest and rolles down a hill with constant acceleration it travels a distance of 400m in 2sec. find the acceleration find the force acting on it. If it's mass 7 tonnes.

Answer:

a = 2 m/s² and F = 14000 N

Explanation:

Given that a truck starts from rest and rolles down a hill with constant acceleration it travels a distance of 400m in 2sec and it's mass is 7 tonnes.

From above we can write,

• Initial velocity of the truck (u) = 0 m/s
• Distance covered by the truck (s) = 400 m
• Time taken (t) = 20 s
• Mass (m) = 7 tonnes = 7000 kg

Now,

s = ut + 1/2at²

Substitute the values,

→ 400 = (0)20 + 1/2 × a × (20)²

→ 400 = 0 + 400a/2

→ 400 = 200a

→ a = 2

Therefore, the acceleration of the truck is 2 m/s².

Now,

Force is defined as the product of mass and acceleration.

Force = mass × acceleration

Substitute the values,

→ F = 7000 × 2

→ F = 14000

Therefore, the force acting on it is 14000 N.