A hockey puck slides across the ice at a constant speed. Is it in equilibrium? … Yes, because it reaches dynamic equilibrium when it moves in a straight line with unchanging speed. The net forces are zero.
What is the criteria for a hockey puck to be considered in equilibrium?
Equilibrium is a state of no change. A hockey puck sliding along slippery ice or a bowling ball rolling at constant velocity is in equilib- rium—until either experiences a non-zero net force. Whether at rest or steadily moving in a straight-line path, the sum of the forces on both is zero: F 0.
When a hockey puck slides across the ice the puck stops Why?
Aristotle: the puck slides to a stop because it seeks its natural state, one of rest. Does a 2-kg iron brick have twice as much inertia as a 1-kg iron brick?
What forces act on a hockey puck sliding on the ice rink?
For example, if I take a slap shot on a hockey puck, from what I understand, the forces acting on the puck are friction, the normal force, and the puck’s weight.
Is a hockey puck sliding at a constant speed a balanced force?
A hockey puck slides across the ice at a constant speed. … The puck is moving and thus not in equilibrium. 2. The puck can be considered neither at rest nor in equilibrium.
What is the equilibrium rule?
In my first physics class, I learned that things at rest, such as that scaffold, are in mechanical equilibrium. That is, all forces that act on it balance to zero. In mathematical notation, the equilibrium rule is ∑F = 0, with ∑ standing for “the sum of” and F for the forces that act on the object.
What are the two types of mechanical equilibrium?
Mechanical Equilibrium is further of two types: Static Equilibrium: Equilibrium where bodies are at rest is known as static equilibrium. Dynamic Equilibrium: Equilibrium where bodies are moving at constant velocity known as dynamic equilibrium. In both cases, the net force acting on them is zero.
What makes a hockey puck slow down?
Explain that friction slows down motion, because of the transfer of kinetic to heat energy. Explain why an engineer must understand friction when designing a hockey puck.
How does the equilibrium rule ΣF 0 relate to Newton’s first law of motion?
An object can be in equilibrium whether it is at rest or moving steadily at a constant speed in a straight line. … objects or systems at rest & objects or systems in uniform motion in a straight line. The equilibrium rule, ΣF=0, applies to. vector quantities.
What is the net force of gravity?
The net gravitational force that a spherical shell of mass M exerts on a body outside of it, is the vector sum of the gravitational forces acted by each part of the shell on the outside object, which add up to a net force acting as if mass M is concentrated on a point at the center of the sphere (Statement 1 of Shell …
Is hockey sliding friction?
Friction – Friction is the force that takes place when one object slides against another. … So, as hockey players push the puck along, friction causes the slightest warmth, melting the ice the tiniest bit and making it easier for the puck to slide.
Why do things slide on ice?
Because ice is less dense than liquid water, its melting point is lowered under high pressures. A long-standing theory says that this is what causes ice to be slippery: As you step on it, the pressure of your weight causes the top layer to melt into water.
Why does a hockey puck moving across smooth ice move at a constant velocity?
These two forces cancel to give a net force of zero in the vertical direction. Since no external force acts in the horizontal direction, according to Newton’s first law, the hockey puck will continue to move at a constant velocity.
What is the total force on the puck?
A hockey puck slides on ice at constant velocity. What is the net force acting on the puck? ZERO: The puck is moving at a constant velocity, and therefore it is not accelerating. Thus, there must be no net force acting on the puck.
Is force a quantity?
Force is a vector quantity; its units are newtons, N. Forces can cause motion; alternatively forces can act to keep (an) object(s) at rest.