For any two independent events E1 and E2 in a space S, is equal to
A.
The resultant of P and Q is R. If Q is doubled, R is also doubled and if Q is reversed, R is again doubled. Then, P2 : Q2 : R2 gven by
2 2 3
3 2 2
2 3 2
2 3 1
Forces ofmagnitudes 3, P, 5, 10 and Q are respectively acting along the sides AB, BC, CD, AD and the diagonal CA of a rectangle ABCD, where AB = 4m and BC = 3m. Ifthe resultant is a single force along the other diagonal BD, then P, Q and the resultant are
5, 6, 7
None of the above
A gun projects a ball at the angle of 45° with the horizontal. If the horizontal range is 39.2 m, then the ball will rise to
9.8 m
4.9 m
2.45 m
19.6 m