Physics · Class 11 · Chapter 3
Motion in a Plane
10 lessons 85 min 2 simulations
Motion along a line needs only a sign for direction; motion in a plane needs vectors. This chapter builds the vector toolkit (adding, subtracting, scaling and resolving into components) and then uses it for position, velocity and acceleration in two dimensions, with projectile motion and uniform circular motion as the two standard cases.
What the exam asks
NEET asks for the resultant of two vectors at an angle, components and unit vectors, the time of flight, maximum height and range of a projectile, complementary angles giving equal range, and centripetal acceleration in terms of v, ω or frequency. Marks are lost by adding magnitudes instead of vectors, using a cosine where a sine belongs, forgetting that the horizontal velocity of a projectile never changes, and thinking uniform circular motion has zero acceleration.
Lessons
10 lessons · 85 min
1Scalars and vectorsNCERT §3.26 min2Multiplying a vector by a numberNCERT §3.36 min3Adding and subtracting vectors graphicallyNCERT §3.47 min4Resolving vectors into componentsNCERT §3.57 min5Adding vectors analyticallyNCERT §3.610 min 1 sim6Velocity and acceleration in a planeNCERT §3.77 min7Constant acceleration in a planeNCERT §3.86 min8Projectile motionNCERT §3.914 min 1 sim9Uniform circular motionNCERT §3.107 min10Chapter reviewMust-know facts, traps and formulas15 min