Since torque is always about some point, if there’s a net force on an object you can always find some point about which there will be a torque. But
you can certainly have a net force on an object that gives no torque about its center of mass
.
What happens if 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
Can you have torque with no net force?
A couple produces a torque about the center. No net external force implies that the center of mass of the object is at rest or moving with constant velocity. No net external torque implies that
the object either does not rotate
or that it rotates with constant angular velocity.
Does torque use net force?
Torque is
the rotational equivalence of force
. So, a net torque will cause an object to rotate with an angular acceleration. … A torque is a force applied to a point on an object about the axis of rotation.
What happens if the net force is zero?
An object with no net forces
acting on it which is initially at rest will remain at rest
. If it is moving, it will continue to move in a straight line with constant velocity. Forces are “pushes” or “pulls” on the object, and forces, like velocity and acceleration are vector quantities. … a is its acceleration.
How do you know if net torque is zero?
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 the formula for net torque?
The net torque is therefore
τnet=∑i|τi|=160−60
+120+10=230N⋅m. τ net = ∑ i | τ i | = 160 − 60 + 120 + 10 = 230 N · m .
What force does not cause any torque?
Any force that is along a line which passes through the axis of rotation
produces no torque. Note that torque is a vector quantity, and, like angular displacement, angular velocity, and angular acceleration, is in a direction perpendicular to the plane of rotation.
What is net torque equal to?
The net torque about an axis of rotation is equal to
the product of the rotational inertia
What is the difference between torque and force?
Force has units of Newtons, while torque, being the product of a force and a distance, has units of Newton ⋅ meters. Torque and force also differ in that force is
a true vector
, whereas torque is a pseudovector
Will the next force be equal to zero?
All forces acting on an object add to zero: the
resultant force is zero
.
How is net force calculated?
Every object has a bunch of forces acting on it. The net force is just the sum of all of these forces acting on an object. … The magnitude of the net force acting on an object is
equal to the mass of the object multiplied by the acceleration of the object
, as shown in this formula.
Can a body have non zero net force with zero velocity?
A body is said to be in
equilibrium
if the net force acting on the body is zero. By Newton’s second law, the acceleration of such objects will be zero. … So an object in equilibrium can either have zero velocity or a constant non-zero velocity.
At what condition torque is zero?
System of Particles and Rotational Motion. Under what condition torque acting on body by a given force is zero? That is, Torque = 0. That is,
when line of action of forces passes through the axis of rotation
, torque is zero.
Is torque proportional to speed?
Torque is
inversely proportional to speed
. Thus, when speed increases, torque will decrease.
Can you have negative torque?
Oh,
torque can be positive or negative
. Let us say that a positive torque would make a stationary object rotate counter clockwise and a negative torque would make it rotate clockwise. If you switched these, it wouldn’t really matter too much.
