Nikol-Naroda unk Road, Near Shukan Banglows, Ahmedal GRADE 7 PHYSICS (WORKSHEET CHIP 1.2 ill in the blanks : The S. I unit of area is 1ml The maximum volume of a liquid that a container can hold is known as its The total space occupied by an object is called its A body is said to be at rest if its with respect to a fixed point in its surroundin not change with time Vibratory motion is a special case of motion The SI unit of speed is "hange in the position of a body can be described by its kgf = he ratio of the total distance travelled to the total time taken is called the following: locity iform velocity riable velocity
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Explanation:
AB
=i+4j−k and
CD
=−2i−8j+2k
Hence the angle between the vectors is given as
θ=cos
−1
(
AB.CD
AB
.
CD
)
=cos
−1
(
18
×
72
−2−32−2
)
=cos
−1
(
36
−36
)
=cos
−1
(−1)
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