0
How do photons exert force if force is mass times acceleration and photons have no rest mass and travel at constant speed?
Wiki User
∙ 11y ago
The problem in the posed question is the "mass" in the equation you quote is the mass of the object upon which the force (whether it be a photon or not) is acting, NOT the mass of the object exerting the force.
You can MEASURE the net force on an object with mass simply by measuring the acceleration of that object and dividing it by the object's mass.
Or you can predict an acceleration of an object with mass by calculating what
its net force will be, and then dividing that by the object's mass.
Unrelated to the above excellent answer, but another comment on the question:
You mention, correctly, that photons have no rest-mass. But the photon is never
at rest, and at the speed at which it moves from place to place, it has mass.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
Rudolph pulls a 50kg sleigh with a constant acceleration of 2ms2how much force does Rudolph exert?
100 n
The fact that light can exert a pressure on matter suggests that it is made of particles called?
The particles of light are called photons.
What does gravity exert?
Gravity exerts an acceleration a= GM/r2 = v2/r.
What will happen when you exert force on an object that is in motion?
Its speed, or direction, or both, change. That's called "acceleration".
Why does liquid exert equal pressure at the same depth?
Pressure = h d g h is the depth, d the density of the liquid and g- acceleration due to gravity. As d and g remain constant, same h would have the same pressure. Hence the case.
Rudolph pulls a 50kg sleigh with a constant acceleration of 2ms2how much force does Rudolph exert?
100 n
How much force does Rudolf exert if he pulls a A kg sleigh with a constant acceleration of 2 M's?
Force = mass x acceleration Force = Akg x 2m/s^2 Unit for force here is in Newtons (N)
The fact that light can exert a pressure on matter suggests that it is made of particles called .?
The particles of light are called photons.
The fact that light can exert a pressure on matter suggests that it is made of particles called?
The particles of light are called photons.
What does gravity exert?
Gravity exerts an acceleration a= GM/r2 = v2/r.
What will happen when you exert force on an object that is in motion?
Its speed, or direction, or both, change. That's called "acceleration".
Why does liquid exert equal pressure at the same depth?
Pressure = h d g h is the depth, d the density of the liquid and g- acceleration due to gravity. As d and g remain constant, same h would have the same pressure. Hence the case.
When mass is added to a moving cart what happens to its acceleration?
The cart's acceleration will decrease as its mass increases. This is why you must exert progressively more force on a shopping cart to move it along as items are added to it. If you were to continue to add items to the cart but not change how hard you push it, the cart would eventually become "impossible" to push.
How do you describe the combined variation of A equals F over M?
I'm not sure exactly what you're asking, but hopefully this answers your question. A=Acceleration F=Force M=Mass The acceleration of an object is dependent on the mass of the object and the force exerted on it. The greater the force is, the greater the acceleration. The greater the mass is, the lower the acceleration. The greater the mass of the object, the more force required to obtain the same acceleration. Examples: Let's say you have an object of mass 8. If you were to exert 16 force, then the acceleration would be 2, but if you exert 4 force, the acceleration is 1/2. Similarly, if you exert 8 force on 2 objects, with masses 16 and 4, then the object with mass 16 would have an acceleration of 1/2, while the object with a mass of 4 would have an acceleration of 2. Hopefully this helped, sorry if it wasn't what you were asking. Also, I think this should be in physics/science, not algebra.
Can charged bodies exert forces even at a distance?
Yes. The gauge particles for the electromagnetic force are (massless) photons, so there's no distance limit to electromagnetic interactions.
How is the wheel and axle useful?
It lightens the amount of force you have to exert to travel over a distance.
When you push on a sled and it begins to go downhill you cause what accelartion?
The acceleration is caused by the force of gravity on the sled combined with the force you exert on the sled by pushing it.
