Grade 11Mechanics

a projectile is fired vertically upwards with an intial velocity u.after an time interval of T seconds projectile is fired vertically upwards,also with intial velocity u.at what time they meet?

dimpy

11 Years agoGrade 11

1 Answer

Nicho priyatham

11 Years ago

do u mean an other projectile is also fired if so then the ans is

first wright finial position equation for partical 1 as function of t

s₁=ut+ -(1/2)gt²

do the same for second partical

s₂=u(t-T)-(1/2)g(t-T)² where t>(or equal)T

now wn they meet s₁=s₂

so solving both the equations we get

ut -(1/2)gt²= u(t-T)-(1/2)g(t-T)²

no further solving we get

t=(T/2)+(u/g)

sorry the queation is not clear u didnt mention wn to count time from

whether 4m time of projection of 1^st partical or that of 2^nd patical

if we count time from t=0 we get ans as (T/2)+(u/g)

PLZ approve if correct and in case of any doubts put in ans dox

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a projectile is fired vertically upwards with an intial velocity u.after an time interval of T seconds projectile is fired vertically upwards,also with intial velocity u.at what time they meet?

dimpy

1 Answer

Nicho priyatham

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