A particle is thrown with the velocity v with the angle a from the horizontal plane and its range on the horizontal plane is twice to themaximum height gained. Then, is equal to
9
5
2
1
Two dice are thrown together. Then the probability that the sum of numbers appearing on them is a prime number, is
A.
The prime numbers between 2 to 12 are 2, 3, 5, 7, 11.
Case I : When sum is 2, total cases are (1, 1) i.e., 1
Case II : When sum is 3, total cases are (1, 2), (2, 1) i.e., 2
Case III : When sum is 5, total cases are (1, 4), (2, 3), (4, 1), (3, 2) i.e., 4
Case IV : When sum is 7, total cases are (1, 6), (2, 5), (3, 4), (6, 1), (5, 2), (4, 3) i.e., 6
Case V : When sum is 11,total cases are (5, 6), (6, 5) i.e., 2
The points 0, 2 + 3i, i - 2 - 2i in the argand plane are the vertices of a
rectangle
rhombus
trapezium
parallelogram
The product of two times of flight from a point P to another point Q with a given velocity of projection is
A stone of mass m is thrown vertically upwards with a velocity of 9.8 ms-1. The height of the point where KE = PE is (g = 9.8 ms-2)
9.8 m
4.9 m
2.45 m
2 m