Question

Two particles are separated at a horizontal distance as shown in the adjacent figure. They are
projected along the same line with different initial speeds. The time after which the horizontal
distance between them becomes zero is:
60
30
х​

Answer 1

Answer:

Let x

1

and x

2

are the horizontal distance travelled by particle A and B, respectively, in time t.

x

1

=

3

u

.cos30

o

×t ...........................(i)

and

x

2

=ucos60

o

×t ...............................(ii)

x

1

+x

2

=

3

u

.cos30

o

×t+ucos60

o

×t=ut

⇒x=ut⇒t=x/u