Suppose that an owner of the same dog breed has also taken some measurements. They notice that the surface area of the dog has i
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Answer:
(A) The y-component of r must be equal to the y-component of c
(B) The x-component of r must be equal to the x-component of c
(C) The z-component of r must be equal to the z-component of c
(F) The unit vector r must be equal to the unit vector c.
Explanation:
If two vectors are equal there are some conditions must be satisfy for the two vectors to be equal.
Let us suppose 2 vectors as,
and
The conditions for the above two vectors should be equal are:
(1) ,
, and
.
(2) Unit vector of A must be equal to unit vector of B.
(3) Magnitude of both the vectors should be equal.
Now, according to question and observing above conditions of equality for r and c to be equal, the statements should be true are:
(A) The y-component of r should be equal to the y-component of c
(B) The x-component of r should be equal to the x-component of c
(C) The z-component of r should be equal to the z-component of c
(F) The unit vector r should be equal to the unit vector c.
Answer:
Explanation:
Given
Each student exert a force of
Let mass of car be m
there are 18 students who lifts the car
Total force by 18 students
therefore weight of car
mass of car
(b)