# IIT JEE Questions And Answers :: Motion In Two And Three Dimensions: part1

IIT JEE : Motion In Two And Three Dimensions QUESTIONS AND ANSWERS :: part1 : 21 to 25

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

 21.A ball of mass M is thrown vertically upwards. Another ball of mass 2M is thrown at an angle ? to vertical. Both of them stay in air for the same period of time, the heights attained by the two are in the ratio: 1:2 2:1 1:1 1: cos ? ANSWER : : 1: cos ?
 22.If retardation produced by air resistance to the projectile is one-tenth of acceleration due to gravity, the time to return from the maximum height: increases by 9% decreases by 9% increases by 11% decreases by 11% ANSWER : : increases by 11%
 23.When the range of a projectile on an inclined plane is maximum then: the focus of the path is on the plane the focus of the path is below the plane the focus of the path is above the plane the focus of the path lies at any place ANSWER : : the focus of the path is on the plane
 24.In the case of an oblique projectile, the velocity is perpendicular to acceleration onece only twice thrice four time ANSWER : : onece only
 25.The range of projectile projected at an angle 15 degree is 10v3 m. If it is fired with the same speed at angle of 30 degree, its range will be: 60 m 45 m 30 m 15 m ANSWER : : 30 m

More Motion In Two And Three Dimensions QUESTIONS AND ANSWERS available in next pages

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