If you try to push an object that is 10 times heavier than you would there be static or kinetic friction? ( the heavy object doesn't move if even you use force)
-I know that there is no kinetic friction because the object is not moving. I am not sure about static friction.
Static friction keeps the heavy object from moving. Unless your shoes slip pushing it, there is static friction below your feet also.
In this scenario, the friction between the object and the surface can be classified as static friction. Static friction occurs when two surfaces are in contact with each other but not in relative motion. It acts in response to the applied force and opposes the impending motion.
To determine if static friction would be present or not, we first need to calculate the maximum static friction force. This force can be represented by the equation:
Fs(max) = μs * N
where Fs(max) is the maximum static friction force, μs is the coefficient of static friction, and N is the normal force.
The normal force N can be calculated by multiplying the mass of the object by the acceleration due to gravity (N = m * g). Since you mentioned that the object is 10 times heavier than you, its mass would be 10 times your mass (m_object = 10 * m_you).
Next, you need to determine the coefficient of static friction μs between the object and the surface it rests on. The coefficient of static friction is a property that depends on the materials in contact and can vary from one situation to another. It is typically a value between 0 and 1.
Once you have calculated the normal force N and determined the coefficient of static friction μs, you can substitute these values into the equation Fs(max) = μs * N to find the maximum static friction force between you and the heavy object.
If the force you apply to push the object is less than or equal to the maximum static friction force, the object will not move, and the static friction force will exactly balance the applied force. In this case, static friction prevents the object from moving.
However, if the force you apply exceeds the maximum static friction force, the static friction force will no longer be able to counteract the applied force, and the object will begin to move. At this point, the friction force will transition from static friction to the lower value of kinetic friction, which opposes the motion of the object.
Therefore, in the scenario you described where you try to push an object that is 10 times heavier than you but it doesn't move even with the applied force, the friction between you and the object would be static friction.