A students walks one hour. She walks 4 blocks east and 2 blocks west. Her average velocity is?
1 answer:
Let us consider the following figure
<em>figure</em><em> </em><em>is</em><em> </em><em>in</em><em> </em><em>pict</em><em>ure</em>
So, his/her total displacement = 2 blocks.
total time = 1 hour
Average Velocity
= Total displacement/ total time
= 2 blocks/ 1 hour
= 2 blocks/ h
So, her/his average velocity is 2 blocks per hour.
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0.157mm, working out shown on photo
Consider the upward direction of motion as positive and downward direction of motion as negative.
a = acceleration due to gravity in downward direction = - 9.81
v₀ = initial velocity of runner in upward direction = 2.0
v = final velocity of runner at the highest point = 0
x = distance by which center of mass of runner rise = ?
Using the kinematics
v² = v²₀ + 2 a x
inserting the values
0² = 2² + 2 (- 9.81) x
x = 0.204 m