Can you have torque with no net force? Solution: (a) A rod free to rotate about an axis that passes through its center has one force pushing down at its right tip and another force of the same magnitude pushing up on its left tip, resulting in a net torque but zero net force.
Can there be torque without a net force?
The answer is no. which is in general non vanishing. The important result associated is that
if the resultant external force vanishes then the torque is independent of the point it is calculated
. It has the same value with respect to any point.
What happens when there is no net torque?
Because there is no net torque acting on an object in equilibrium,
an object at rest will stay at rest, and an object in constant angular motion will stay in angular motion
. where T net is the net torque acting on the pivot.
Is torque included in net force?
There may be more than one force acting on an object, and each of these forces may act on different point on the object. Then, each force will cause a torque.
The net torque is the sum of the individual torques
.
Is net torque and net force the same?
Net torque changes the rotational velocity of an object. Net force changes the velocity of an object.
Can torque be zero when force is nonzero?
For an object to be in mechanical equilibrium, the net external force and the net external torque acting on the object have to be zero. F
tot
= 0, τ
tot
= 0.
The total torque can be nonzero, even though F
tot
= 0
. Consider the situation shown in the figure on the right.
What force does not cause any torque?
Torque is the product of a force exerted on an object times the lever arm. Q. What force does not cause any torque?
Force perpendicular to the fulcrum
.
Can an object rotate with zero net torque?
torque = mass x rate of change of velocity x radius from point of contact to point of rotation .
If your angular velocity is constant (the rate of change of angular velocity is 0), you can be turning but have no net torque
.
What does it mean if torque is zero?
If Torque = 0 ; that means
either Force(perpendicular) = 0 , or Radius = 0
; Case I : If Force(perpendicular) = 0; that means Acceleration(perpendicular) will be equal to 0; therefore Velocity(perpendicular) won’t change . This implies Angular Momentum (L=mvr) won’t change. Angular Momentum remains constant.
How can torque be zero?
The magnitude of the torque depends on:
An applied force can result in zero torque
if there is no lever arm or the applied force is parallel to the lever arm
(see Figure 3 and 4 below).
When force is zero then torque will be?
When the torque acting upon a system is zero, the
angular momentum is constant and hence is conserved
. This is analogous to the linear counterpart i.e. when the force on the system is zero, the momentum is conserved.
What does torque depend on?
The magnitude of torque of a rigid body depends on three quantities:
the force applied, the lever arm vector connecting the point about which the torque is being measured to the point of force application, and the angle between the force and lever arm vectors
.
When the net force is zero the torque is independent of the origin?
What it do mean.In case of dipole along a uniform field. The distance from the pivot point to the point where the force acts is called the moment arm, and is denoted by ‘r’, it is independent of the pivot point(origin).
Can a single force produce torque?
A single point force not acting at the COG, will always provide a torque
but this torque will be accompanied by a net linear force as well since there is no opposing force. So, the net motion will be a combination of rotational and linear motion.
Can a force produce a torque when there is no lever arm?
Can a force produce a torque when there is no lever arm?
No because there needs to be a lever arm to produce torque.
Do all rotating objects have torque?
Because all rotational motions have an axis of rotation,
a torque must be defined about a rotational axis
. A torque is a force applied to a point on an object about the axis of rotation.
What is zero when net torque is not rotating?
If the net torque on a rotatable object is zero then
it will be in rotational equilibrium and not able to acquire angular acceleration
.
What is nonzero torque?
A non-zero net torque about A means that
the angular momentum about A is changing
. But it is possible for that change to be due to a linear acceleration instead of rotation. If A is at rest in an inertial frame, then the change will have to include rotation. But if A is accelerating, then rotation is not necessary.
Is the net force zero?
The net force is the combined force of all individual forces acting on an object. Newton’s First Law can be seen to be the special case in the Second Law
when F, the net force, is zero
. When that happens, the acceleration a must also be zero.
Can a body rotate without torque?
Explanation:
an object that is not rotating has no net torque
, but an object rotating at constant angular velocity also has no angular acceleration, and therefore no net torque acting on it . … Newtons first law tells us that an object remains at rest or at a constant velocity unless it is acted upon by a force.
Is net force acting on a rigid body is zero then net torque?
A :
For a body to be in rotational equilibrium the net torque acting on the body about any point is zero
. <br> R : For net torque to be zero, net force should also be zero.
Can an object be in rotational motion if the net force 0?
What is zero torque? Zero torque is defined as “for any object under rotational motion,
if net perpendicular force is zero, then rotational equilibrium sets up and thus angular acceleration is not possible
; this condition is zero torque.”
What force causes torque?
The product of the force and the perpendicular distance to the center of gravity for an unconfined object, or to the pivot for a confined object
, is^M called the torque or the moment. A torque is also a vector quantity and produces a rotation in the same way that a force produces a translation.
What are the 3 factors that determine torque?
Examples: Page 5 Torque is Determined by Three Factors:
The magnitude of the applied force. The direction of the applied force. The location of the applied force
.
When force is zero then torque will be?
When the torque acting upon a system is zero, the
angular momentum is constant and hence is conserved
. This is analogous to the linear counterpart i.e. when the force on the system is zero, the momentum is conserved.
What does torque depend on?
The magnitude of torque of a rigid body depends on three quantities:
the force applied, the lever arm vector connecting the point about which the torque is being measured to the point of force application, and the angle between the force and lever arm vectors
.
How is net torque like net force?
Is it possible for the net force acting on an object to be zero but the net torque to be greater than zero?
If the net torque on a system is zero, is the net force also zero?
No, forces add so the net force is not zero but the net torque is zero.
