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1.A wave of frequency 1200 Hz spred over a lenth of 10 m.Wat is the wavelength?what is the speed?2.A constant force of magnitude 10 N is applied on a 20 kg particle for 2s.Wat is acceleration of the paticle.If the particle starts from rest wat is its final velocity?

Answer»

We KNOW that VELOCITY = WAVELENGTH ( distance ) * FREQUENCY...
putting the VALUES...
v=1200*10v=12000m/s
2 F=10
M=20t=2


F=ma ...10=20*aa=0.5m/s^2
by using v=u+at...calculate the final velocity!



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