In some SUVAT questions, they ask for 2 time solutions and I can only find 1. What am I missing?
Let's say we are trying to work out how long it will take for a ball to be caught after it has been thrown straight upwards. If we set the final displacement to be zero (S=0) and solve S=UT+0.5AT2, it appears that we only get one value for T. However, there will always be a step in your workings when you can cancel a T from both sides of the equation, for example: 5T2 = 100T can be simplified to 5T = 100. In this step, we miss out a solution that T=0! This corresponds to when the ball is just about to be thrown so is still in our hands (hence we have a solution for zero displacement!)
CI
Related Physics A Level answers
All answers ▸If f(x)= ln(x^2)-4, give f^-1(x)
One of the decays of potassium (A=40, Z=19) results in an excited argon atom with excess energy of 1.50 Mev. In order to be stable, it emits a gamma photon. What frequency and wavelength has this gamma photon?
What is the angular velocity of a car wheel which diameter is d = 15 mm if the car velocity is of 120 km/h?
Why is a pendulum with a bob of the same size but larger mass than another bob damped more lightly?