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A ball is thrown in the air with velocity of 50.0 m/s, assuming no air resistance calculate its maximum height.

Use SUVAT equations to find height, S, when final velocity, V, is 0: s = ?u = 50 m/sv = 0 m/sa = -9.81 m/st = Not necessaryRecall: v 2 = u 2 +2as s = -u 2 /(2a) = -2500/(2 x -9.81) = 127.4 m But given to 3 s...
OG
Answered by Oliver G. • Physics tutor
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From the 2016 OCR B paper A ball is thrown at an angle of 30 Degrees to the horizontal. The initial kinetic energy of the ball is K. Air resistance is negligible. What is the kinetic energy of the ball at the maximum height.

This is a common class of question concerning projectile motion and the independence of orthogonal forces. First the student should sketch the problem an label the forces, In doing this they will see that th...
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Answered by Andrew R. • Physics tutor
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How does the photoelectric effect actually show that light is made up of particles?

The photoelectric effect is the observation that when light of a certain frequency or higher is shone onto a particular metal surface, electrons are emitted from the metals surface. Let's consider a device k...
RM
Answered by Robert M. • Physics tutor
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An electron is moving with speed 2x10^5ms-1 through a magnetic field of strength 0.5T. If the electrons velocity is perpendicular to the direction of the magnetic field, what is the magnitude of the force felt by the electron?

F = q v x B = qvB sin(O). q is the electrons charge = 1.6x10 -19 C. v is the electrons speed = 2x10 5 ms -1 . B is the magnetic field strength = 0.5 T. O is the angle between the electrons velocity vector an...
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Answered by Angus B. • Physics tutor
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Describe the purpose of the moderator in a nuclear fission reactor.

The moderator material is generally graphite or water. These materials do not absorb or react with the neutrons, they simply act to slow down fast moving neutrons. If neutrons are moving too quickly they are...
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Answered by Samar K. • Physics tutor
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