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# Tag Archives: solution

## Chemical effects of current

How much Ag can be deposited as uniform layer on a metallic vessel using 0.2 Ampere current passed through silver salt solution for 3 hours.(1 mol of Ag=108g)

SAN THOMAS ASKED

## Solution to HC Verma Problem

“Referring to HC Verma Part 2, chapter 29, Electric field and potential, Q 69

I think that Force is inversely proportional to square of the distance between the charged particles, so acceleration is not constant and hence

v*v = u*u + 2*a*s is not valid in this case.

How is proceed with this question ?” Satyam asked

## Projectile Motion

Ramesh Asks:

“A body is projected with velocity u with an angle with the horizontal. What is its average velocity when it crosses half of its max height”

## A question from kinematics – motion in one dimension

Natasha Sehgal Asked:

“A stone is thrown in a vertically upward direction with a velocity of 5m/s. If the acceleration of the stone during its motion is 10m/s^2 in the downward direction , what will be the height attained by the stone and how much time will it take to reach there?”

Answer:

Take,

u=5m/s

a= -10 m/s^{2}

v=0 at the topmost position

S= H_{max} = ?

The eqn of motion to use

v^{2} – u^{2} = 2aS

Which gives H = 1.25 m

From the eqn

v=u + at

t= 0.5 s