Calculating Velocity

[904901860]

This is the equation you would use for this correct? because p= mv?

[Ana Pedreros]

yes and you could also use ke=1/2mv^2

[davidryan3f]

yes, the two equations involving velocity are p=mv and KE= 1/2mv^2

[Alli Hinmon 3E]

Make sure you know the Difference!!!
p=mv is for the velocity of a photon, he will usually give you the momentum.

Ke is for Electrons!

[Lynsea_Southwick_2K]

What is the units for momentum, p?

[805169754]

What is the units for momentum, p?

If the mass is in kilograms and the velocity is in meters per second then the momentum is in kilogram meters per second (kg⋅m/s)

[205458163]

Most of the time we use 1/2mv^2 to calculate velocity.

[George_Zhu]

It depends on different condition, like if you need to calculate the velocity, and you have time and distance, you can use the most common equation:v=s/t, and if you have the momentum and mass of a subject, and you need to calculate the velocity, you can use the equation you have mentioned.

[Brian Kwak 1D]

Depends on the know information you have. If you know the kinetic energy of an electron then you could use 1/2mv^2 or if you know the momentum of the electron then you could use p=mv. Also the units for momentum would be kg.m.s^-1.

[Yen Ho Chou 1D]

electrons use ke, photons use the momentum equation