Objects falling through the air experience a type of friction called air resistance
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Answer:
Explanation:
The force excerted by a magnetic field on a charged particle is given by the Lorentz force:
Lets consider the z-direction of our coordinate system the same direction of the magnetic field, that is:
Let us consider that the velocity of a given particle is:
Therefore, since k×k = 0
And since i, j , k are a rigth hand system:
i × j = k
j × k = i
k × i = j --> i × k= -j
Threfore, if the particle has charge q and velocity v = (vx,vy,vz), the magnetic force it will feel will be
The final momentum of the body is equal to 120 Kg.m/s.
<h3>What is momentum?</h3>Momentum can be described as the multiplication of the mass and velocity of an object. Momentum is a vector quantity as it carries magnitude and direction.
If m is an object's mass and v is its velocity then the object's momentum p is: . The S.I. unit of measurement of momentum is kg⋅m/s, which is equivalent to the N.s.
Given the initial momentum of the body = Pi = 20 Kg.m/s
The force acting on the body, Pf = 25 N
The time, Δt = 4-0 = 4s
The Force is equal to the change in momentum: F ×Δt = ΔP
25 × 4 = P - 20
100 = P - 20
P = 100 + 20 = 120 Kg.m/s
Therefore, the final momentum of a body is 120 Kg.m/s.
Learn more about momentum, here:
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