Home
Class 9
PHYSICS
A ball thrown vertically upwards returns...

A ball thrown vertically upwards returns to the thrower in `20` second. Calculate the velocity with which it was thrown and the maximum height attained by the ball. Take `g = 10 m//s^(2)`.

A

100 m/s, 200 m

B

10 m/s, 500 m

C

100 m/s, 500 m

D

None

Text Solution

Verified by Experts

The correct Answer is:
C
Time of ascent = time of desent, `t = (20)/(2) = 10 s`
`u = ?, h = ?, g = 10m//s^(2)`.
At the highest point, `v = 0`
From `v = u +at`
`0 = u - 10 xx 10, u = 100 m//s`
From `v^(2) - u^(2) = 2 as`
`0 - (100)^(2) = 2(-10)h`
`h = (100 xx 100)/(2 xx 10) = 500 m`
Promotional Banner

Topper's Solved these Questions

  • MOTION

    PRADEEP|Exercise formative Assesment paper pen test|15 Videos

  • MOTION

    PRADEEP|Exercise Formative Assessment 1(b) - Oral testing (Exercise)|1 Videos

  • MOTION

    PRADEEP|Exercise Worksheet testing(fill in the blanks)|5 Videos

  • GRAVITATION

    PRADEEP|Exercise Model Test paper (1)|36 Videos

  • SOUND

    PRADEEP|Exercise Model Test (sec - B)|12 Videos

Similar Questions

Explore conceptually related problems

A ball trown up vertically returns to the thrower after 10 second. Calculate (i) the velocity with which it was thrown up. (ii) the maximum height it reachesand (iii) its poisition after 7 second.

A ball thrown up vertically returns to the thrower after 8 second. Calculate (i) velocity with which it was thrown (ii) maximum height it acquired. (iii) velocity with which it hit the ground.Given g=9.8 m//s^(2) .

A ball thrown up vertically returns to the thrower after 6s. Find (a) the velocity with which it was thrown up. (b) the maximum height it reaches, and (c) its position after 4s.

A ball is thrown up at a speed of 4.0 m/s. Find the maximum height reached by the ball. Take g=10 m//s^2 .

A ball is thrown vertically upwards with a velocity of 49 ms^-1 . Calculate :The maximum height to which it rises

A body is thrown vertically upwards and rises to a height of 10m. The velocity with which the body was thrown is (g - 9.8m/( s^(2) )