a hockey puk is sliding across frictionless ice at 6m/s. a) what is the net force on the puck? b)what forces act on the puck?
you need more information than that, at least a mass or an acceleration because
Newton's second law: F=ma
To determine the net force and the forces acting on the hockey puck, we can use 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.
a) What is the net force on the puck?
Given:
- Initial velocity of the puck (u) = 6 m/s
- Assuming the puck is sliding at a constant velocity, there is no acceleration (a = 0)
Using Newton's second law: F_net = m * a
Since the acceleration is zero, the net force on the puck is also zero. The puck will continue moving at a constant velocity since there is no force acting on it to change its state of motion.
b) What forces act on the puck?
In this scenario, since the puck is sliding across frictionless ice at a constant velocity, there are no external forces acting on the puck. However, there are two internal forces acting:
1. Weight (mg): The force due to gravity acting vertically downward. Even though the puck is on frictionless ice, it still has weight.
2. Normal force (N): The force exerted by the ice on the puck in the vertical direction, perpendicular to the surface of the ice. It acts as a reaction force to counterbalance the weight of the puck.
It's important to note that these forces do not cause any change in the motion of the puck.