Q.1
Which of the following lists comprises three vector quantites?
A dispacement, velocity, energy B
C velocity, ecceleration, power D force, work, energi
Answer: B
Displacement, velocity, momentum, acceleration and force are vector quantities.
Q.2
The given diagram shows two force, each of 10 N, acting at a poin P.
The anggle between the directions of the forces is 1200.
Which of the following is the magnitude of the resultant force?
A 5 N
C 17 N
Answer: B
Sketch triangle for vector addition: Deduce that triangle is equilateral, i.e. ǀRǀ = 10 N.
Q.3
Two vectors X and Y are shown in the given diagram.
Which one of the vector triangles correctly shows the magnitude and direction of the vector Z as the vector X – Y?
Answer: B
Only B shows
Z = X – Y → Z = X + (–Y) or X = Z + Y
Q.51
Which one of the following is not a vector quantity?
A acceleration
Answer: B
Acceleration, momentum and velocity are vectors. Mass is a scalars.
Q.4
Which one of the following pairs comprises one vector quantity and one scalar quantity?
A displacement : acceleration
C momentum : velocity
Answer: B
Displacement, acceleration, force, momentum and velocity are vector quantities.
Kinetic energy, power and speed are scalar quantities.
Q.5
Which list of quantities contains only scalar quantities?
A mass, acceleration, temperature, kinetic energy
B mass, volume, electric potential, kinetic energy
C acceleration, temperature, volume, electric charge
D moment, electric field, density, magnetic flux
Answer: B
Mass, volume, electric potential, kinetic energy, temperature, electric charge, density and magnetic flux are scalar quantities.
Acceleration, moment, electric field and velocity are vector quantites.
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