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How am I going to remember all of the particles I need to know? (A-level Physics)

(This is accompanied with a whiteboard drawn diagram)."Well, the way I solved this problem when I was doing my A-levels was to make a spider diagram. For instance, the particle zoo (the name given to th...
JP
Answered by Joe P. • Physics tutor
5150 Views

What is the minimum initial velocity necessary for an object to leave Earth?

The problem can be easily solved using energy formulas. The only force that acts on the departing object is the gravitational force, which is conservative. Therefore the total energy is conserved on the traj...
LS
Answered by Leontica S. • Physics tutor
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Compare and contrast geostationary and low polar orbits.

Geostationary orbits are only possible at one distance from Earth. This is because the very nature of the geostationary orbit requires the satellite to have the same time period as the rotational period of t...
TH
Answered by Tesni H. • Physics tutor
9792 Views

Why does a feather fall at the same rate as a hammer on the Moon?

To calculate an object's weight, we have weight = mass * gravitational field strength (W = mg). From this, we see that an object with a greater mass (e.g. a hammer compared with a feather) has a greater weig...
JT
Answered by Joel T. • Physics tutor
10522 Views

Can a projectile of speed 10m/s at an angle of 45° to the horizontal following a path perpendicular to a wall 8m away and 6m high reach beyond the wall? Justify your answer. Take g as 10m/s/s

First draw a rough diagram of what the question describes. The student must work backwards. To answer, they must know the height of the projectile at the wall. To know the height of the projectile, they need...
AB
Answered by Anton B. • Physics tutor
2006 Views