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Two pellets are fired simultaneously from the horizontal, one is fired vertically at 100m/s and the other is fired at 200m/s at an angle theta from the horizontal. Calculate the angle of the second pellet if they both land at the same time.

For this problem, we can look at the two pellets individually. If we find the time taken for the first bullet to reach the ground again, then we know that it must take the same time for the second bullet to ...
CI
3749 Views

How does Einsteins explanation of the photons explain the effect of varying intensity of light in the Photoelectric effect?

The Photoelectric Effect - when a material emits electrons from its surface as it's exposed to incident light. It might be expected that an increase in light intensity would increase the KE of the emitted el...
JB
Answered by James B. • Physics tutor
2357 Views

What distance is one Parsec

(Diagram needed) As the Earth orbits the sun, the apparent position of a (relatively) nearby star varies with relation to a background of much more distant stars. The parallax angle is the angle between obse...
KG
Answered by Katie G. • Physics tutor
5971 Views

A child is standing on a walkway that is moving at 2 metres per second and decides to turn around and walk back to the start at 2 metres per second. Explain why the child cannot reach the start of the walkway at this speed.

Assuming that the walkway is moving in a positive direction, the child is walking in the opposite direction to it and is therefore walking in the negative direction. Both the child and the walkway have veloc...
MS
Answered by Merry S. • Physics tutor
2230 Views

How do I solve a problem about a mass on a slide?

It is good practice in physics to draw a diagram of the situation, so the first thing we want to do is create a picture of the problem, focussing on the object on the slide. Now we need to analyse what is ha...
SZ
Answered by Stefano Z. • Physics tutor
2815 Views