Question

a truck starts from rest and rolls down a hill with a constant acceleration it travels a distance of 400 metre in 20 seconds .find its acceleration find the force acting on it if it mass is 7 tonnes.​

Answer 1

Answer:

Answer: 14000 N

Given parameters

Initial velocity (u) = 0

Distance travelled (s) = 400 m

Time taken (t) = 20 s

1 metric ton = 1000 kg

7 metric ton = 7 × 1000 = 7000 kg

∴ Mass (m) = 7000 kg

We know the formula

[latex]s = ut + \frac{1}{2}at^{2}[/latex]

Substitute the given parameters in the above equation

400 = 0 + ½ a (20)2

400 = a × 400/2

400 = 200 × a

a = 2 m/s2

Acceleration is equal to 2 m/s2

Force (F) = Mass (m) × Acceleration (a)

Substitute the values of mass and acceleration in the above equation, we get

F = 7000 × 2

F = 14000 N

Explanation:

Answer 2

acceleration is 2m\s^2

and force exerted is 14000N