Answer:
m = 15 kg
Explanation:
Applied force to the cart, F' = 18 N
Force of friction, f = 15 N
Net force acting on the cart,
F = F' - f
F = 18 - 15
F = 3 N
The change in velocity of the cart is 1 m/s every 5 s.
We need to find the mass of the cart.
The formula of net force is given by :
F = ma, where a is the acceleration of the cart
[tex]F=\dfrac{m\Delta v}{t}\\\\m=\dfrac{Ft}{\Delta v}\\\\m=\dfrac{3\times 5}{1}\\\\m=15\ kg[/tex]
So, the cart's mass is 15 kg.
