Question

8000 kg engine pulls A train of 5 Wagons each of 2000 kg along a horizontal track if the engine exerts a force of 4000 n and track the offers of friction force of 5000 and then calculate the following questions
a. the net acceleration force?
b. acceleration of train​

Answer 1

Answer :-

• u = 0$\dfrac{m}{s}$

• s = 400m

• t= 20 seconds

• A = ?

• F = ?

a. The net acceleration force :-

⠀⠀⠀⠀⠀⟹ Force exerted - friction force

⠀⠀⠀⠀⠀⟹ 40,000N - 5,000N

⠀⠀⠀⠀⠀⟹ 35,000N

b. Acceleration of train (a) :-

• Force = 35,000N

Mass of 5 wagons filled by engine

⠀⠀⠀⠀⠀⠀= 5×2000

⠀⠀⠀⠀⠀⠀=10000 kg

⟹${\boxed{\large{\bold{F\:=\:ma}}}}$

⠀⠀⠀⠀⠀⠀⟹ 35,000 = 1000 × a

⠀⠀⠀⠀⠀⠀⟹ a = $\dfrac{35000}{10000}$

⟹ A = 3.5${m}^{2}$