Home
Class 11
MATHS
(a) A ball is thrown vertically upward f...

(a) A ball is thrown vertically upward from the ground with an initial velocity of 39.2 m/sec. if the only force consdiered is that attributed to the acceleration due to gravity , find
(i) How long will it take for the ball to strike the ground ?
(ii) the speed with which will it strike the ground ? and
(iii) how high the ball will rise ?
(OR)
(b) A wound is healing in such a way that t days since Sunday the area of the wound has been decreasing at a rate of ` -3 /( ( t+2)^(2)) cm^(2)` per day. If on Monday
the area of the wound was 2 `cm^(2)`
(i) What was the area of the wound on Sunday ?
(ii) What is the anticipated area of the wound on Thursday if it continues to heal at the same rate ?

Text Solution

Verified by Experts

The correct Answer is:
(a) `39.2t - 4.9 t^(2)`
(i) ` t = 8 sec`
(ii) v = 39.2 m/sec
(b) (i) 2.5 sq.cm
(ii) 1.5 sq. cm.
(b) ` 1/x^(2)`
Promotional Banner

Topper's Solved these Questions

  • SURAS MODEL QUESTION PAPER -2

    SURA PUBLICATION|Exercise section - III|10 Videos

  • SURAs MODEL QUESTION PAPER - 1

    SURA PUBLICATION|Exercise PART-IV|11 Videos

  • TRIGONOMETRY

    SURA PUBLICATION|Exercise SECTION - D|5 Videos

Similar Questions

Explore conceptually related problems

A ball is thrown vertically upward from the ground with an initial velocity of 39.2 m/sec. If the only force considered is that attributed to the accleration due to gravity , find (i) how long will it take for the ball to strike the ground ? (ii) the speed with which will it strike the ground ? and (iii) how high the ball will rise ?

A ball is thrown vertically upward from the ground with an initial velocity of 39.2 m/sec . If the only force considered is that attributed to the acceleration due to gravity find how high the ball will rise ?

A ball is thrown vertically upward from the ground with an initial velocity of 39.2 m/sec . If the only force considered is that attributed to the acceleration due to gravity, find the speed with which will it strike the ground and

A ball thrown up vertically returns to the person after 6s. Find the velocity with which it was thrown up.

A ball is thrown vertically upwards with velocity of 49 m/s. Calculate i. Maximum height to which it rises ii. Total time t it takes to return to the surface of Earth.

A player throws shotput from the ground level with initial velocity 16 ft/sec .Find the maximum distance can be thrown and at what angle .

A stone is thrown vertically upwards with initial velocity of 40 m/s. Taking g=10m//s^(2) find the maximum height and total distance covered by stone.

A circket ball falls from a height of 40 m. What is the velocity with which the ball hits the ground ?

A ball is thrown vertically upwards with the speed of 19.6 ms^(-1) from the top of building and reaches the earth in 6 s. Find the height of the building .

Value of acceleration due to gravity is 9.8m//sec^(2) . Find its value in km//hr^(2) .