Time after which velocity vector is perpendicular to initial velocity vector
Answers
Answer:
Explanation:
It asks me the time when the velocity of the particle will be perpendicular to its initial velocity. The teacher taught us how to solve it, but I didn't get the concept. Can someone explain the concept? I remembered him solving this problem by using either dot product or cross product of vector. I expect the explanation will not be too difficult for high school student.
Answer:
Explanation:
When the velocity becomes perpendicular to initial velocity following condition must hold true. Components perpendicular to resultant velocity must be zero !
gt sin30 = v ( think why ? Hint: geometric method of vector addition )
t = v/ g× sin30
= 20/9.8× 0.5
= 4.08 seconds
From the figure, it is clear that when the velocity becomes perpendicular to initial direction , the magnitude is ( gt cos30 )
# Physics solution must be more intuitive and less mathematical for students to digest.
# You can use dot product method as well . Equate dot product of initial and final velocity in vector notation to zero