Calculating Time of Impact for a Ball Thrown Against a Wall

[SamAnthony]

Homework Statement

A ball of mass 50g is thrown horizontally against a wall such that it strikes it
at a velocity of 12ms-1. If it exerts a force of 3N on the wall, determine the
time of impact.

Homework Equations

The Attempt at a Solution

I drew the diagram and made the direction and wrote the values neatly on my paper as it's sort of a must to do this and it makes me understands the work better. Does the 50g needs to be changed and converted into kg?

 

[Kishlay]

is the collision elastic??

 

[Kishlay]

as we know
dp=F.dt
and hence you could find the answer

 

[Kishlay]

Does the 50g needs to be changed and converted into kg?

yes it is needed to...!

 

[SamAnthony]

I got totally confused! that's the full question. So is it 0.2s?

 

[Kishlay]

i think the question is some how incomplete... please look and write all the information given in the question...!

 

[SamAnthony]

That's the full question! maybe there's a trick in it? not sure, otherwise there's another value which could be taken as 0?

 

[Kishlay]

then it will be . change in momentum = Δp = p(initial)-p(final)
assume the ball is movin along +ve x direction
then
Δp = p-(-p)= 2p
an hence pu it in the above equation

 

[Kishlay]

click thanks on it...:)

 

[SamAnthony]

Sure! :) I'm new to this, and I'm figuring this forum out! and thanks for your help too

 

[Kishlay]

he he he ok...!

 

[haruspex]

is the collision elastic??

you don't need to know. Change in momentum = ∫F.dt.