Question

The position vectors of two balls are given by r = 2(m)i +7(m); 1) = -2(m)i +4(m)j What will be the distance
between the two ball?
​

Answer 1

Answer:

Correct option is

A

5

Displacement vector of two balls

r

1

−

r

2

r

1

−

r

2

=4

i

^

+3

j

^

∴ distance d=∣

r

1

−

r

2

∣=

16+9

=

25

=5