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How do I solve a problem about a mass on a slide?

It is good practice in physics to draw a diagram of the situation, so the first thing we want to do is create a picture of the problem, focussing on the object on the slide. Now we need to analyse what is...

Answered by Stefano Z. • Physics tutor

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A truck with mass 1200kg is moving at 8m/s when it collides head-on with a stationary car of mass 800kg. As they collide, the vehicles move together with the same velocity, v. Calculate this velocity.

Momentum is conserved. MU + mu = (M+m)v (1200 x 8) + (800 x 0) = (1200 + 800)v 9600 = 2000v v = 9600/2000 = 4.8m/s

Answered by Rachel H. • Physics tutor

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What is a stationary wave?

A stationary wave forms when there are two waves of equal frequency (or wavelength) travelling in opposite directions, passing through one another. Interference occurs, with constructive interference at a...

Answered by Samuel P. • Physics tutor

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What would happen to n and Emax when a) the intensity is reduced to 1/2 I but the wavelength λ is unchanged? b) the wavelength λ is reduced but the intensity is unchanged?

FULL QUESTION: Electromagnetic radiation of wavelength λ and intensity I, incident on a metal surface, causes n electrons to be emitted per unit time. The maximum kinetic energy of the electrons is Emax. ...

Answered by Kim E. • Physics tutor

6334 Views