Respuesta :
The weight of an object is its mass times acceleration.
Weight of the box = (10kg)(9.81m/s^2) = 98.1N
If the box is at rest, then the normal force is equal to the weight of the box:
Normal force = 98.1N
If the box does not move, then the static friction force with 20 N is also 20N
Static Friction Force = 20N
If the box begins to move at 40, the maximum static friction force is equal to 40N
Maximum static friction force = 40N
Weight of the box = (10kg)(9.81m/s^2) = 98.1N
If the box is at rest, then the normal force is equal to the weight of the box:
Normal force = 98.1N
If the box does not move, then the static friction force with 20 N is also 20N
Static Friction Force = 20N
If the box begins to move at 40, the maximum static friction force is equal to 40N
Maximum static friction force = 40N
Explanation:
1. Mass of the box, m = 10 kg
Weight of an object is equal to the product of its mass and acceleration due to gravity. Its expression is given by :
W = mg
[tex]W=10\ kg\times 9.8\ m/s^2[/tex]
W = 98 N
2. The normal force acting on an object is equal to its weight. So, N = 98 N
3. If the box is pushed to the left with 20 N of force and it is not moving, then there is a force acting on it which is called frictional force. The static friction force have magnitude of 20 N and it is acting in opposite direction of motion.
4. When the pushing force is increased to 40 N and the box begins to move, then the maximum static frictional force is equal to applied force i.e. 40 N.
