Relation between kinetic energy and maximum height of a projectile
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What is K.E of a projectile at its maximum height?
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Shivang Verma, Student
Answered Aug 3 2017
It depends upon whether the projectile is vertically upwards or at an angle with horizontal.
1: If body is moving vertically upward then it would definitely be zero at the top most point since there is only vertical velocity applied to the body (in Y direction). Thus at the top most point the kinetic energy becomes zero as “Ke=1/2mv²” and v(velocity) is zero here. Instead entire kinetic energy changes to potential energy.
2. If a projectile is projected at some angle to the horizontal then the velocity wouldn't be zero at the top most point. Since Ke=1/2*mv² and here the velocity is the resultant of two velocities at horizontal direction and vertical direction which is given by the parallelogram law of vector.
Still have a question? Ask your own!
What is your question?
15 ANSWERS

Shivang Verma, Student
Answered Aug 3 2017
It depends upon whether the projectile is vertically upwards or at an angle with horizontal.
1: If body is moving vertically upward then it would definitely be zero at the top most point since there is only vertical velocity applied to the body (in Y direction). Thus at the top most point the kinetic energy becomes zero as “Ke=1/2mv²” and v(velocity) is zero here. Instead entire kinetic energy changes to potential energy.
2. If a projectile is projected at some angle to the horizontal then the velocity wouldn't be zero at the top most point. Since Ke=1/2*mv² and here the velocity is the resultant of two velocities at horizontal direction and vertical direction which is given by the parallelogram law of vector.
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