Top answers

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
2502 Views

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...
AR
Answered by Andrew R. • Physics tutor
9156 Views

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
5345 Views

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...
AB
Answered by Angus B. • Physics tutor
2540 Views

What is the period and frequency of a wave? - GCSE or A-Level students may ask this

A wave could be transverse or longitudinal. We like to think in terms of whole waves. This is when a particle comes back to it's original position and direction of movement. For transverse waves, we can see ...
SP
Answered by Saabir P. • Physics tutor
2351 Views