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How to determine the total time of flight for a projectile launched at an angle theta to the horizontal with an initial speed u?

First, decompose the initial velocity (u) into x and y components using trigonometry. These are x= ucos(theta) and y=usin(theta) Note that the x (or horizontal) component does not change but the y component ...
JB
Answered by Jonathon B. • Physics tutor
9261 Views

Why doesn't the magnetic force change the velocity of a particle?

Well actually, it does. Remember that the velocity is a vector and so is the force. Since F=ma, the acceleration due to a given force points in the same direction as the force itself. The magnetic force is p...
AS
Answered by Ana S. • Physics tutor
4155 Views

How do we know the energy of a photon (light particle) is quantised?

Firstly, quantisation of energy means that energy can only exist for specific, discrete values, i.e. it is not continuous. Now, photons display this phenomena however it is not immediately obvious why, as in...
BM
Answered by Ben M. • Physics tutor
3285 Views

Discuss how X-rays and Ultrasound can be used for medical purposes, including their advantages and disadvantages.

Uses for x-rays: Detecting broken bones, Cancer treatment, CT scans._ Uses for Ultrasound: Pre-natal scanning, Destruction of kidney stones/plaque on teeth, Internal imaging of body parts._ Advantages of X-r...
IF
Answered by Isaac F. • Physics tutor
10229 Views

A ball is hit horizontally at a height of 1.2 m and travels a horizontal distance of 5.0 m before reaching the ground. The ball is at rest when hit. Calculate the initial horizontal velocity given to the ball when it was hit.

In order to find the velocity, we need to know the distance covered by the ball in a known length of time. We are given the distance, 5.0 m, therefore we need to compute the time of flight of the ball. This ...
FS
Answered by Francesco S. • Physics tutor
12652 Views