Suppose the designers of the water slide want to adjust the height h above the water so that riders land twice as far away from the bottom of the slide. what would be the necessary height above the water?
a. 1.2 m
b. 1.8 m
c. 2.4 m
d. 3.0 m

option C

Explanation:

given,

Range is doubled

for range to be doubled height should become 4 times.

formula to calculate the horizontal range

          R = v T_{flight}

using equation of motion

now,

where, h is the height of the

Assuming the height be equal to 0.6 m

to calculate the new height

hence, the correct answer is option C

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

wavelength divides in half and speed stays the same.