Motion in a plane
Comprehensive Questions and
Solutions Graded A+
What are scalar quantities? - Answer: Physical quantities which have only magnitude which can
either be negative or positive and a unit of measure.
eg- mass, distance, average speed, temperature,
instantaneous speed, energy, pressure
density, charge
What are vector quantities? - Answer: Any physical quantity which have both magnitude and
direction . They follow laws of vector algebra .
eg - momentum, velocity, impulse, angular momentum, torque, gravitational field, electric field,
magnetic field
What are parallel vectors? - Answer: If two vectors have same direction, they are parallel to
each other.
What are anti-parallel vectors? - Answer: When two vectors are in opposite direction, they are
said to e anti-parallel.