Question
The motion of an object under free fall is an example of
which of the following?Solution
The motion of an object under free fall is a case of uniform acceleration. If an object is released from a height near the surface of earth, it accelerates downwards under the influence of a gravity pull with acceleration due to gravity.
The marks obtained by 15 students out of a maximum of 25 in a test are given as 13, 11, 16, 15, 18, 12, 13, 14, 10, 22, 21, 20, 17, and 24. Find the sum...
In a geometric progression, the first term is 4 and the common ratio is 2. If the sum of the first n terms is 252, what is the value of n?
18, 27, 54, 135, 400, 1417.5
What is the mean of the following numbers:
45, 50, 55, 60, 65
Find the third proportion of 16 and 24.
The 5th term of an arithmetic progression is 23 and the 12th term is 72. Find the first term and the common difference.
The mode and the mean of grouped data are 25 and 29.5 respectively. Find the median, correct to two places of decimal, using empirical relation.
The fourth term of an arithmetic progression is 6. Then the sum of first seven terms is:
a, b, c in GP; a + b + c = 21, abc = 216. Find numbers.
Boat ‘A’ can cover 320 km in still water in 16 hours. In still water, if the ratio of the speed of boat ‘A’ to that of ‘B’ is 5:3 and the sp...
