, , , and and will get +1 marks; choosing ONLY

, and and will get +2 marks; choosing ONLY and will get +1 marks; choosing ONLY

and = 60°

. ONE OR MORE THAN ONE of these four option(s) is(are) correct answer(s). • For each question, choose the option(s) corresponding to (all) the correct answer(s). • Answer to each question will be evaluated according to the following marking scheme: Full Marks : +4 ONLY if (all) the correct option(s) is(are) chosen; Partial Marks : +3 If all the four options are correct but ONLY three options are chosen; Partial Marks : +2 If three or more options are correct but ONLY two options are chosen, both of which are correct; Partial Marks : +1 If two or more options are correct but ONLY one option is chosen and it is a correct option; Zero Marks : 0 If none of the options is chosen (i.e. the question is unanswered); Negative Marks : -2 In all other cases. • For example, in a question, if are the ONLY three options corresponding to correct answers, then choosing ONLY will get +4 marks; choosing ONLY will get +2 marks; choosing ONLY will get +2 marks; choosing ONLY will get +1 marks; choosing no option (i.e. the question is unanswered) will get 0 marks; and choosing any other combination of options will get -2 marks. A slide with a frictionless curved surface, which becomes horizontal at its lower end,, is fix the terrace of a building of height 3h from the ground, as shown in the figure. A spherical b mass m is released on the slide from rest at a height h from the top of the terrace. The ball 1 the slide with a velocity and falls on the ground at a distance d from the building making an angle with the horizontal. It bounces off with a velocity v and reaches a maximum height . The acceleration due to gravity is g and the coefficient of restitution of the ground is . Which of the following statement(s) is(are) correct? d/h 1 =