1 Physical quantities such as length, mass, time and temperature are referred to as
vector quantities
fundamental quantities
scalar quantities
derived quantities
2 The following are examples of vector quantities except
displacment
velocity
accleration
speed
3 The addition of two vectors and gives a third vector known as the --------------of the two vectors
resultant
sum
distance
displacement
4 If two vectors are represented by two adjacent sides of a parallelogram the resultant is represented in _________ and _________.
triangle and rectangle
magnitude and dierction
parallel and perpendicular
scalar and vector
5 The following are examples of derived units except
juoles
coulomb
ampere
newton
6 The derived unit of momentum is
Ns
J\S
N\S
Nms
7 The dimension of power is
ML−2T2
ML2T−2
MLT−2
ML2T−3
8 The following is a fundamental unit except.
kelvin
newton
radian
seconds
9 The Watt is the same as.@
Nms−1
Js
Kgm2s−2
Ns
10 which of the following is a set of vectors?
velocity and volume
weight and displacement
density and distance
mass and force
D D A A B C D D D C
BDABCADBAB
Which of the following is a set of vector
quantities?
velocity and volume
weight and displacement
density and distance
mass and force
1. Fundamental quantities - Physical quantities such as length, mass, time, and temperature are referred to as fundamental quantities because they are independent and cannot be defined in terms of other physical quantities.
2. Speed - Speed is a scalar quantity because it only refers to the magnitude of motion, not the direction. Displacement, velocity, and acceleration are all vector quantities because they have both magnitude and direction.
3. Resultant - The addition of two vectors gives a third vector known as the resultant. The resultant represents the combined effect of the two vectors in terms of magnitude and direction.
4. Magnitude and direction - If two vectors are represented by two adjacent sides of a parallelogram, the resultant is represented in terms of magnitude and direction. The magnitude represents the length or size of the resultant vector, while the direction represents the angle or orientation of the resultant vector in relation to the original vectors.
5. Coulomb - Joules, ampere, and newton are examples of derived units. These units are derived from the fundamental units by mathematical combinations. Coulomb, on the other hand, is a fundamental unit of electric charge.
6. Ns - The derived unit of momentum is Newton-second (Ns). Momentum is calculated by multiplying the mass of an object by its velocity, and the unit for mass is kg and for velocity is m/s, so the unit for momentum becomes kg·m/s or Ns.
7. ML^2T^-2 - The dimension of power is ML^2T^-3. Power is the rate at which work is done or energy is transferred, and its unit is derived from the fundamental units of mass (M), length (L), and time (T). The unit for power is watts (W), which can also be expressed as kg·m^2/s^3.
8. Newton - Newton is not a fundamental unit, but a derived unit. It is the unit of force and is derived from the fundamental units of mass (M), length (L), and time (T). The unit for force is kg·m/s^2.
9. Joule (J) - The watt (W) is equivalent to a joule per second (J/s) because power is the rate at which energy is transferred or work is done. Since work is measured in joules (J) and time in seconds (s), the unit for power becomes J/s or watt.
10. Mass and force - Mass and force are examples of vectors. Mass is a vector because it has direction in relation to gravitational fields, and force is a vector because it has both magnitude and direction. Velocity and displacement, weight and displacement, and density and distance are not sets of vectors because they either have different dimensions or are not directly related in terms of magnitude and direction.