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What is P in physics?
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What is the symbol for momentum in physics?
P: power: W: watt: ω, ω: rotational velocity, rotational speed: rad/s: radian per second: α, α: rotational acceleration: rad/s 2: radian per second squared: τ, τ: torque: N m: newton meter: I: moment of inertia: kg m 2: kilogram meter squared: L, L: angular momentum: kg m 2 /s: kilogram meter squared per second: H, H: angular impulse: N m ...
G {\displaystyle G} electrical conductance. siemens (S) universal gravitational constant. newton meter squared per kilogram squared (N⋅m 2 /kg 2 ) shear modulus. pascal (Pa) or newton per square meter (N/m 2 ) g {\displaystyle \mathbf {g} } acceleration due to gravity.
MeaningSi Unit Of Measuretesla meter (T⋅m)unitlessIn physics, the symbol for the quantity momentum is the lower case p. Thus, the above equation can be rewritten as. p = m • v. where m is the mass and v is the velocity. The equation illustrates that momentum is directly proportional to an object's mass and directly proportional to the object's velocity.
Momentum is a measurement of mass in motion: how much mass is in how much motion. It is usually given the symbol p . By definition, p = m ⋅ v. Where m is the mass and v is the velocity. The standard units for momentum are kg ⋅ m / s , and momentum is always a vector quantity.
- so.... if you want to change the momentum of an object, you have to apply a force. OK?? But if you apply that force for a long time then the moment...
- The first part of the question requires us to find out how much impulse the astronaut is *capable* of applying which depends on how strong she is....
- Yes! That's entirely correct. Impulse is a certain amount of force you apply for a certain amount of time to cause a change in momentum. That is wh...
- They are different things thrust is a type of force but they do share the same units this is because force is a general term whil thrust is a subse...
- I think airbag is one of of it . Force and time is inversely proportional in momentum calculation so if time is increased, force is decreased. The...
- If the force is constant at 250 for 30 s then taking the area under the curve IS multiplying 250 * 30. But if the force is not constant then you ca...
- The specific impulse equals the change of momentum over the weight of fuel.
- Overview
- Introduction to Momentum
- Frame of Reference
- What else should I know about momentum?
Review your understanding of momentum in this free article aligned to NGSS standards.
Both the mass and velocity of an object impact momentum. As a result, less massive objects can have more momentum than more massive objects (if the less massive object is moving faster), and slower objects can have more momentum than faster objects (if the slower object has more mass). For example, a parked car has less momentum than a flying mosquito and a bicycle moving at 20 mph has less momentum than a freight train moving at 1 mph .
Depending on the situation, we can consider the momentum of individual objects, or we can consider the total momentum of an entire system. The total momentum of a system is the vector sum of all the individual masses that comprise the system. So for a system that consists of two masses, m1 and m2 , with velocities v→1 and v→2 , we can write P→total=p→1+p→1 , where p→1=m1v→1 and p→2=m2v→2 .
Since v→ is a vector, momentum, p→ , is also a vector. As such, the frame of reference impacts how we determine velocity v→ , and thus momentum p→ . For example, the passenger inside a moving car will have a momentum of 0 with respect to the car, but their momentum is non-zero with respect to the ground.
In addition, for the chosen reference frame, the x -direction and the y -direction of the momentum for each object must be considered separately. For example, two objects with the same mass and speed moving in the same direction will have total momentum of 2mv . But if those objects were moving directly towards each other, they would have a total momentum of zero.
•Momenta of zero. If an object is moving, its momentum cannot be zero. However, this is not necessarily true for a system. Since momentum is a vector, the total momentum of a system can be zero if there are multiple masses. For instance, a system of two objects that have the same magnitude of momentum and are moving directly toward one another will have a total momentum of zero.
•Momentum can be represented by p→ or by P→ . You may sometimes see p→ for an individual mass and P→ for a system of masses.
Jul 21, 2023 · What does “P” stand for in physics? In the world of science, P is used to represent several fundamental concepts such as momentum, power, pressure, and probability. These concepts are essential to our understanding of how the physical universe works.
About. Transcript. Momentum (P) is equal to mass (M) times velocity (v). But there are other ways to think about momentum! Force (F) is equal to the change in momentum (ΔP) over the change in time (Δt). And the change in momentum (ΔP) is also equal to the impulse (J). Impulse has the same units as momentum (kg*m/s or N*s). Created by Sal Khan.
- 9 min
- Sal Khan
