NEET · Physics doubts
127 doubts found
What is the difference between systematic error and random error?
Systematic errors are consistent and one-directional (fixable by calibration); random errors scatter both ways (reduced by averaging).
What is the difference between distance and displacement?
Distance is the total path length (scalar, never decreases); displacement is the straight-line vector from start to finish (can be zero on a round trip).
What is the difference between static friction and kinetic friction?
Static friction acts on a stationary object and self-adjusts up to a limit; kinetic friction acts on a sliding object and is roughly constant (and usually smaller).
What is the difference between elastic collision and inelastic collision?
Both conserve momentum; an elastic collision also conserves kinetic energy, while an inelastic one converts some KE into heat/deformation.
What is the difference between torque and force?
Force causes linear acceleration; torque causes angular acceleration and depends on where the force is applied.
What is the difference between orbital velocity and escape velocity?
Orbital velocity keeps a satellite in a circular orbit; escape velocity (√2 times larger) lets it leave gravity forever.
What is the difference between C_p and C_v?
C_p (constant pressure) exceeds C_v (constant volume) because at constant pressure some heat also does expansion work.