A particle is uncharged and is thrown vertically upward from ground level with a speed of 5√5 ms−1. As a result, it attains a maximum height h. The partide is then given a positive charge +q and reaches the same maximum height h when thrown vertically upward with a speed of 13 ms−1. Finally, the particle is given a negative charge −q. Ignoring air resistance. determine the speed (in ms−1) with which the negatively charged particle must be thrown vertically upward, so that it attains exactly the same maximum height h. (Assume uniform electric field and g=10 ms−2).

A particle is uncharged and is thrown vertically upward from ground le

1.	A particle is uncharged and is thrown vertically upward from ground level with a speed of 5√5 ms−1. As a result, it attains a maximum height h. The partide is then given a positive charge +q and reaches the same maximum height h when thrown vertically upward with a speed of 13 ms−1. Finally, the particle is given a negative charge −q. Ignoring air resistance. determine the speed (in ms−1) with which the negatively charged particle must be thrown vertically upward, so that it attains exactly the same maximum height h. (Assume uniform electric field and g=10 ms−2).
Answer» A particle is uncharged and is thrown vertically upward from ground level with a speed of $5 \sqrt{5} {ms}^{- 1} .$ As a result, it attains a maximum height $h .$ The partide is then given a positive charge $+ q$ and reaches the same maximum height $h$ when thrown vertically upward with a speed of $13 {ms}^{- 1} .$ Finally, the particle is given a negative charge $- q .$ Ignoring air resistance. determine the speed (in ${ms}^{- 1}$ ) with which the negatively charged particle must be thrown vertically upward, so that it attains exactly the same maximum height $h$ . (Assume uniform electric field and $g = 10 {ms}^{- 2}$ ).

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