IB Physics SL A.2.12 Field Forces

Practise identifying gravitational, electric and magnetic action through fields and deciding which force acts from mass, charge and motion relative to the field direction or…

Exam points

identify a field as the model required for force at a distance without direct contact
select gravitational force for mass and electric force for charge, regardless of whether the particle moves
apply magnetic force only to moving charge with a velocity component perpendicular to the magnetic field

[Maximum number: 1]

A planet is in a circular orbit around a star. The speed of the planet is constant.

State the nature of this centripetal force.

gravitational force/force of gravity

2.

b

use of $\frac{G M}{R^{2}}$

6.4 « $\mathrm{Nkg}^{-1}$ or $\mathrm{ms}^{-2}$ »

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A.2.12—Field forces question 1