Assignment 3 Name: 1. Which of these physical quantities is a vector and which i
ID: 2889763 • Letter: A
Question
Assignment 3 Name: 1. Which of these physical quantities is a vector and which is a scalar? a. the acceleration of a drag racer c. the velocity of a wave at a beach e. the speed of light g. the volume of a box i. the force of gravity k. the density of a lead weight m. the area of a parallelogram b. the mass of the moon d. the frequency of a musical note f. the age of a child h. the energy produced by an electric generator j. the time on a kitchen clock I. the pressure of the atmosphere n. the temperature of a swimming pool 2. Write the quadrant bearing S40 E as a true bearing. 3. Which vectors are a) parallel to vector AB b) equivalent to vector AB? c) opposite to vector AB? 4. ABCDE is a pentagon such that AB-DC and AC-2ED. Write each vector in terms of AB and AC a) CE b) AE MCV4U - A3Explanation / Answer
1.
A vector quantity is one which has magnitude and direction both.
A scalar quantity is one which has magnitude but no direction.
a> Acceleration of a drag racer is a vector quantity as acceleration could be positive or negative so its has a direction of its own and there is magnitude as well.
b> The mass of moon is a scalar quantity as mass is just some quantity there is not direction to it.
c> Velocity of waves at a beach is a vector quantity as the velocity has a direction same as acceleration and there is magnitude as well.
d> Frequency of a musical note is a scalar quantity as there is not direction associated with frequency of musical notes.
e> Speed of light is a scalar quantity as speed is just a quantity and there is no direction. If it has direction as well then it becomes velocity.
f> Age of a child is a scalar as age is never a negative quantity its just a number with no sign.
g> Volume of a box is a scalar quantity as there is no direction to the volume just magnitude.
h> Energy prodeced by an electric generator is a scalar quantity as it has no direction just the magnitude.
i> Force of gravity is a vector quantity as it has quantity and force could be positive or negative and that represents the direction.
j> Time on a kitchen clock is a scalar quantity.
k> Density of a lead weight is a scalar quantity as there is no direction to density just the magnitude.
l> Pressure of the atmosphere is a scalar quantity.
m> Area of a parallelogram is a scalar quantity as there is no direction to area just the magnitude.
n> Temperature of a swimming pool is a scalar quantity.as temperature has no direction just the quantity.