A cart loaded with bricks has a total mass of 26.2 kg and is pulled at constant speed by a rope. The rope is inclined at 26.3

constant-speed

#1

A cart loaded with bricks has a total mass
of 26.2 kg and is pulled at constant speed by
a rope. The rope is inclined at 26.3

above
the horizontal and the cart moves 23.9 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/s
2
.
What is the normal force exerted on the
cart by the floor?
Answer in units of N.

Answer:

Normal Force is simply the opposite of mg (mass x gravity). Thus normal force can be written as mg.
However, there is also a pulling force at an angle of 26.3 degrees.
You need to find the y component of this force which is the sin(26.3). Multiply this number by mg and you have your total Normal Force.