A cart loaded with bricks has a total mass of 13.4 kg and is pulled at constant speed by
a rope. The rope is inclined at 21.1° above
the horizontal and the cart moves 17.2 m on
a horizontal floor. The coefficient of kinetic
friction between ground and cart is 0.3.
The acceleration of gravity is 9.8 m/s2.
What is the normal force exerted on the
cart by the floor?
Answer in units of N.