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"An inclined plane at an angle of 25 degrees to the horizontal has a pulley at its top. A 30kg block on the plane is connected to a freely hanging 20kg block by means of a cord passing over the pulley. From rest how far will the 20kg block fall in 2s?

For the 20kg block choose downward as positive and for the 30kg block choose the x axis along the incline as positive.Apply Newton's second law of motion to each block separately.The pulley is frictionless a...
JW
Answered by Joni W. • Physics tutor
5357 Views

Define light, critical and heavy damping in simple harmonic motion.

Damping reduces the amplitude of oscillation of a system over time. Critical damping reduces the amplitude of the oscillations to zero in the shortest possible time, returning the system to the equilibrium p...
OW
Answered by Oscar W. • Physics tutor
21199 Views

State Newton's 3 Laws in words and/or mathematically

1st Law - An object will remain at rest or continue at constant velocity unless acted on by an unbalanced force 2nd Law - F=ma (for a constant mass body) /the net force acting on a body is directly proportio...
MF
Answered by Martha F. • Physics tutor
2435 Views

What is the de Broglie wavelength? Why do we care?

The de Broglie wavelength is an important idea in physics that shows that all matter with mass can also show wave-like properties. For example, an electron (which we usually think of as a particle) can diffr...
YE
Answered by Yorick E. • Physics tutor
4805 Views

Energy generation can occur in both renewable and non-renewable ways. Part a) List three methods of non-renewable energy generation. Part b) List 2 methods of renewable energy generation. [Bonus] Part c) Why might it be beneficial to use renewable?

a) Coal/Nuclear/(Natural) gas. b) Any two from Wind/Hydroelectricity/Solar/Geothermal or any other equally valid form of renewable energy generation. [Bonus] c) Fossil Fuel emissions can release gases into o...
CJ
Answered by Callum J. • Physics tutor
1826 Views