Two identical stones, a and b, are thrown from a cliff from the same height and with the same initial speed. stone a is thrown vertically upward, and stone b is thrown vertically downward. which of the following statements best explains which stone has a larger speed just before it hits the ground, assuming no effects of air friction?

a. both stones have the same speed; they have the same change in ugand the same ki
b. a, because it travels a longer path.
c. a, because it takes a longer time interval.
d. a, because it travels a longer path and takes a longer time interval.
e. b, because no work is done against gravity.

b. A, because it travels a longer path.

Explanation:

This can be justified by the equation of motion given below:

where:

final velocity

initial velocity

acceleration = g (here)

displacement of the body

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards