A cart weighing 15 kg is pushed with a force of 45 N. The acceleration of the cart is 1 m / s2.

A cart weighing 15 kg is pushed with a force of 45 N. The acceleration of the cart is 1 m / s2. What is the modulus of the force that prevents the movement of the trolley

The sum of the forces acting on the body:

F – Fc = ma, where F is the force with which the cart is pushed (F = 45 N), Fc is the resistance force to the movement of the cart, m is the mass of the cart (m = 15 kg), a is the acceleration of the cart (a = 1 m / c2).

Let us express and calculate the value of the resistance force to the movement of the trolley

Fc = F – ma = 45 – 15 * 1 = 45 – 15 = 30 N.

Answer: The modulus of the force that prevents the movement of the trolley is 30 N.