Paper 3 Data Hunt
Paper 3 is "easily fraudable" once you spot the pattern: either every value you need is already given, or you're expected to know the missing equation from the formula booklet. For each scenario, sort the cards into the right category.
Projectile off a Cliff
A ball is kicked horizontally off the top of a $20\ \text{m}$ cliff with a speed of $12\ \text{m s}^{-1}$. Air resistance is negligible and $g=9.81\ \text{m s}^{-2}$. Find how far from the base of the cliff the ball lands.
Tap a card below, then tap the category it belongs to.
Cliff height = 20 m
Horizontal launch speed = 12 m s⁻¹
g = 9.81 m s⁻²
s = ut + ½at² — gives the time of flight from the vertical drop
range = horizontal speed × time of flight
v² = u² + 2as — gives the landing speed, which is not asked for
Photoelectric Effect
Light of wavelength $400\ \text{nm}$ is incident on a metal surface with work function $2.3\ \text{eV}$. Find the maximum kinetic energy of the emitted electrons. ($h=6.63\times10^{-34}\ \text{J s}$, $c=3.00\times10^{8}\ \text{m s}^{-1}$, both given on the data sheet.)
Tap a card below, then tap the category it belongs to.
Wavelength λ = 400 nm
Work function φ = 2.3 eV
Planck constant h = 6.63×10⁻³⁴ J s
Speed of light c = 3.00×10⁸ m s⁻¹
hf = φ + KEmax — photoelectric equation
c = fλ — used to find frequency f from λ