Question
Which law explains why it is difficult to hammer a nail
into a freely suspended wooden frame?Solution
According to Newton's third law, every action has an equal and opposite reaction. When you try to hammer a nail into a freely suspended frame, the frame moves in the opposite direction, making it difficult.
- The average of three numbers is 60. When three more numbers are included, the average increases by 6. Find the average of the numbers included.
- Average of 5 figures is 70. When two more figures are added with an average of 'x', the new average increases by 10%. Find the value of 'x'.
In a gathering of 30 guests, the average age of each guest in the class is 21 years. Later, 4 more guests join the party, causing the average age of the...
The average of 20 numbers is 75. The average of the first 12 numbers is 80, while the average of the last 11 numbers is 68. If the 12th number is remove...
The average weight of 14 persons increases by 3.5 kg when a new person comes in place of one of them weighing 48 kg. The weight of the new person is.
The average of 6 numbers is 40. Later, two more numbers are added whose average is 'x' . After this, the overall...
The average age of 13 girls is 40 years. If the age of one more girl is added the average decreases by half a year. What is the age of new girl?
Average of four numbers is 24. Sum of smallest and largest number is 53. If difference between other two numbers is 1, then find the square of second sm...
A number is such that when it is multiplied by 3, it gives another number which is as much above from 240 as the original number (itself) is below 240. ...
The average Economics marks of two sections A and B of class X in the annual examination is 70. The average marks of Section A is 72.5 and that of secti...
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