Scalars and Vectors
Physics ⇒ Mechanics
Scalars and Vectors starts at 8 and continues till grade 12.
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See sample questions for grade 12
A boat moves 4 km east and then 3 km north. What is the direction of its resultant displacement with respect to east? (Give answer in degrees.)
A vector has a magnitude of 12 units and is directed along the negative y-axis. Write its component form.
Define a scalar quantity and give two examples.
Describe the triangle law of vector addition.
A boat moves 4 km east and then 3 km north. What is the direction of its resultant displacement with respect to east? (Give answer in degrees.)
A force of 10 N acts at an angle of 30° to the horizontal. What is the horizontal component of the force? (Give answer up to two decimal places.)
A man walks 3 km north and then 4 km east. What is the magnitude of his resultant displacement?
A vector has a magnitude of 12 units and is directed along the negative y-axis. Write its component form.
Which of the following is a correct statement about the cross product of two vectors?
(1) The result is a scalar.
(2) The result is a vector perpendicular to both.
(3) The result is always zero.
(4) The result is parallel to the first vector.
Which of the following is a scalar quantity?
(1) Momentum
(2) Velocity
(3) Distance
(4) Acceleration
Which of the following is a vector quantity?
(1) Speed
(2) Distance
(3) Displacement
(4) Mass
Which of the following is not a scalar quantity?
(1) Energy
(2) Power
(3) Force
(4) Temperature
Fill in the blank: The magnitude of a unit vector is ________.
Fill in the blank: The physical quantity 'work' is a ________ quantity.
Fill in the blank: The resultant of two vectors is maximum when the angle between them is ________.
Fill in the blank: The SI unit of displacement is ________.
State whether the following statement is true or false: The cross product of two parallel vectors is zero.
State whether the following statement is true or false: The direction of a scalar quantity can be specified.
State whether the following statement is true or false: The magnitude of a vector can never be negative.
State whether the following statement is true or false: The magnitude of the sum of two vectors is always equal to the sum of their magnitudes.
