A juggler maintains four balls in motion, making each of them to rise a height of 20 m from his hand. What time interval should he maintain, for the proper distance between them

Question

A juggler maintains four balls in motion, making each of them to rise a height of 20 m from his hand. What time interval should he maintain, for the proper distance between them (A) 3 s (B) (3/2) s (C) 1 s (D) 2 s

Tardigrade Admin · Accepted Answer

From v2 = u2 - 2as we have 0 = u2 - 2 (10) (20) or u = 20 m/s Also v = u - at or 0 = 20 - 10 t or t = 2 s So, the ball returns to the hand of the juggler after 4 s. To maintain proper distance, the balls must be thrown up at an interval of (4/4) or 1 s

Q. A juggler maintains four balls in motion, making each of them to rise a height of $20 m$ from his hand. What time interval should he maintain, for the proper distance between them

3 s

$\frac{3}{2} s$

1 s

2 s

From $v^{2} = u^{2} - 2 a s$ we have

$0 = u^{2} - 2 (10) (20)$

or $u = 20 m / s$

Also $v = u - a t$

or $0 = 20 - 10 t$

or $t = 2 s$

So, the ball returns to the hand of the juggler after $4 s$ .

To maintain proper distance, the balls must be thrown up at an interval of $\frac{4}{4}$ or $1 s$

Q. A juggler maintains four balls in motion, making each of them to rise a height of 20m from his hand. What time interval should he maintain, for the proper distance between them

3 s

23​s

1 s

2 s

From v2=u2−2as we have 0=u2−2(10)(20) or u=20m/s Also v=u−at or 0=20−10t or t=2s So, the ball returns to the hand of the juggler after 4s. To maintain proper distance, the balls must be thrown up at an interval of 44​ or 1s

Q. A juggler maintains four balls in motion, making each of them to rise a height of $20 m$ from his hand. What time interval should he maintain, for the proper distance between them

$\frac{3}{2} s$

From $v^{2} = u^{2} - 2 a s$ we have

$0 = u^{2} - 2 (10) (20)$

or $u = 20 m / s$

Also $v = u - a t$

or $0 = 20 - 10 t$

or $t = 2 s$

So, the ball returns to the hand of the juggler after $4 s$ .

To maintain proper distance, the balls must be thrown up at an interval of $\frac{4}{4}$ or $1 s$