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Particle A (60kg) moves right at 50m/s. It collides with particle B (250kg) moving left at 10m/s. If after the collision particle A moves left at 20m/s, calculate the final velocity of particle B

First the total initial momentum of the particle system is calculated. Treat right as the positive x-direction and left as the negative x-direction. Then:Total initial momentum (Pi) = Inital momentum of A + ...
OL
Answered by Oliver L. • Physics tutor
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A body with speed v is projected from the surface of the earth(mass M & radius R). Find the maximum distance from the earth that this body reaches before returning back to earth, as a function of the initial speed v, M, R and the gravitational constant G

This question tests the students' understanding on conservation of energy, gravitational potential and algebraic manipulation.The first step is identifying that the principle to use is the conservation of en...
CV
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People A and B are taking a lift of mass 500 kg which has constant acceleration and the force from the rope that pulls it is 7500 N. The scales where the people stand show a reading of 720 N and 500 N.

Question 1 : Find the acceleration of the lift.Implementing Newton's Second Law we have : F net =M α lift --->T-F A -F B -M g =M α lift ---> α lift =( T-F A -F B -M g )/M (1)Substituting the relevant v...
GN
Answered by Geri N. • Physics tutor
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Coal is a non-renewable energy resource. Name two other non-renewable energy resources.

oil and gas
KY
Answered by Kieran Y. • Physics tutor
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Electrons moving in a beam have the same de Broglie wavelength as protons moving in a separate beam. The proton beam moves at a speed of 3.1 x 10^4 m/s. What is the speed of the electrons?

From the data sheet, the de Broglie wavelength, 𝜆 = h/p = h/(mv) The electron wavelength equals the proton wavelength so: 𝜆 e = 𝜆 p So: h/(m e v e ) = h/(m p v p ) m e v e = m p v p so the electron speed , v...
AG
Answered by Alexandra G. • Physics tutor
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