All they want is the magnitude of the force.freshbox said:
Not in presenting your final answer.freshbox said:
There's nothing wrong with your solution. I'm just pointing out that often when they ask for some quantity they just want the magnitude of that quantity.freshbox said:
Your error is thinking that the package ends up with zero final velocity. It just stops moving with respect to the flatcar. After the package stops sliding, the package and flatcar end up moving with the same nonzero speed.freshbox said:
In order to analyze the effect of the friction force between package and flatcar, you need to treat them separately so that the friction is an external force.freshbox said:
It all depends on the particular problem. The key thing is to realize that you can apply the impulse momentum to them separately or together, as needed.freshbox said:
Right.freshbox said:
The impulse momentum method for linear motion is a mathematical approach used to analyze and predict the motion of objects in a straight line. It is based on the principles of Newton's second law of motion, which states that the net force acting on an object is equal to its mass multiplied by its acceleration.
The impulse momentum method differs from other methods, such as the kinematic equations or energy methods, in that it takes into account the time during which a force acts on an object. It also considers the change in momentum of an object, rather than just its position or velocity.
The equation used in the impulse momentum method is FΔt = mΔv, where F is the net force acting on the object, Δt is the time interval during which the force acts, m is the mass of the object, and Δv is the change in velocity of the object. This equation is derived from Newton's second law of motion.
The impulse momentum method is used in various real-world situations, such as analyzing the impact of collisions, calculating the force needed to change the velocity of an object, and designing safety measures in sports and transportation. It is also used in industries such as aerospace and automotive engineering to predict and optimize the motion of objects.
While the impulse momentum method is a useful tool for analyzing linear motion, it has some limitations. It assumes that the object is moving in a straight line and that the net force acting on the object is constant. It also does not take into account external factors such as air resistance, which can affect the motion of an object in the real world.
