Answer:
2.45 m
Explanation:
First of all, we have to calculate the time of flight of the book, by using the equation for the vertical motion:
where
h = 1.19 m is the vertical distance covered by the book
g = 9.8 m/s^2 is the acceleration of gravity
t is the time of flight
Solving for t,
Now we can find the horizontal distance covered by the book, which is given by
where
is the horizontal velocity
t = 0.49 s is the time of flight
Substituting,
So the book lands 2.45 m away.
In a string of length , there are exactly
odd-numbered posiitons. In the remaning
even-numbered positions, we want to choose from only two possible digits, either a 1 or a 2. This means there are
such ternary strings.
Explanation:
This question involves continuous displacement in various directions. When it becomes difficult to imagine, vector analysis becomes handy.
Let us denote each of the individual displacements by a vector. Consider the unit vectors as the unit vectors in the direction of East and North respectively.
By simple calculations, we can derive the unit vectors in the directions North,
South of West and
North of West respectively.
So Total displacement vector = Sum of individual displacement vectors.
Displacement vector =
Magnitude of Displacement =
∴ Total displacement =
Answer:
Explanation:
Given
Speed while running towards east is
Distance traveled in east direction
For Another interval you run with velocity
Total displacement
Time for first interval
Time for second interval
total time
average velocity
Therefore average velocity is less than