A Level Physics problem-solving questions
Browse free read-only ProblemBOT examples for A Level Physics. Each preview shows the full problem, topic links and worked-solution guidance, with an option to try the question interactively.
Forces and Motion, Energy & Power, Materials
A testing rig uses a heavy block of mass $M = 12.0\text{ kg}$ to calibrate a vertical safety spring. The block is initially held at rest against the top of the spring. When released, the block compresses the spring. (a) The block is released from rest and...
Waves, Oscillations, Thermal Physics
A specialized acoustic sensor consists of a small metal sphere of mass $m = 1.20 \times 10^{-2}\text{ kg}$ suspended by a spring. When the sphere is displaced and released, it undergoes simple harmonic motion (SHM). An engineer uses an oscilloscope to...
Forces and Motion, Circular Motion, Oscillations
A small robotic probe of mass $m = 0.450\text{ kg}$ is designed to test the surface of a low-gravity asteroid. The probe is launched horizontally from the top of a vertical cliff of height $H = 12.0\text{ m}$ with an initial speed $u$. (a) On this asteroid,...
Waves, Electricity
A specialized "plasma-acoustic" sensor consists of a thin cylindrical tube of length $L = 0.850\text{ m}$ and cross-sectional area $A = 1.20 \times 10^{-4}\text{ m}^2$. The tube is filled with a partially ionized gas where the number density of free...
Waves
A student uses a signal generator to produce a sound wave in a laboratory. The signal is monitored using a cathode-ray oscilloscope (CRO). The trace on the screen shows a clear sinusoidal wave. The time-base of the CRO is set to $250\text{ }\mu\text{s...
Nuclear Physics
A researcher is investigating the properties of a specific isotope of Gold, $^{197}_{79}\text{Au}$. In a scattering experiment, alpha particles ($^{4}_{2}\text{He}$) are fired at a thin gold foil. (a) Calculate the radius of a $^{197}_{79}\text{Au}$ nucleus....
Gravitational Fields, Nuclear Physics
A hypothetical "Nuclear Star" is a dense, spherical object composed entirely of neutrons. It has a radius $R$ of $12.0\text{ km}$ and a uniform density equal to that of an atomic nucleus, $\rho = 2.30 \times 10^{17}\text{ kg m}^{-3}$. (a) Show that the mass...
Waves
A student uses a signal generator to produce a sound wave in a laboratory. The wave is detected by a microphone connected to an oscilloscope. The oscilloscope screen shows a trace of the wave with the time-base set to $50\text{ \mu s cm}^{-1}$ and the...
Forces and Motion
A high-speed "smart-sled" is tested on a horizontal track for emergency braking systems. The sled, initially travelling at a constant velocity $u$, passes a sensor at $t = 0$. At this instant, the braking system is engaged. The velocity $v$ of the sled as a...
Oscillations
A "magnetic spring" is constructed using two identical small neodymium magnets. One magnet is fixed to the base of a vertical glass tube. The second magnet, of mass $m = 12.0\text{ g}$, is placed inside the tube such that it is repelled by the fixed magnet...