Question
A stone of mass 0.08 kg is thrown vertically upwards.
Give the direction and magnitude of the net force on the stone during its downward motion. Ignore air resistance.Solution
When the stone is moving in a downward direction, then the only force acting on the stone is the weight of the stone in the downward direction. Hence net force acting on the stone is the weight of the stone. Net force = 0.8 N
The sum of three positive numbers is 144. If the ratio of the first and second numbers is 4:5, and the difference between the first and third number equ...
- βNβ is the largest three-digit number that leaves 1 as a remainder when divided by 16, 6 and 9. Find the sum of digits of βNβ.
Group βMβ comprises four even integers in order, and group βNβ includes four successive odd integers. If the average of their first elements is ...
- Find the minimum value of x if the number 87256x72 is divisible by 9.
If (2/3)rdΒ of βxβ exceeds (2/5)thΒ of (x + 5) by 6, then find the value of βxβ.
The sum of two numbers is 30 while the difference between these two numbers is 6. What is 50% of the product of the two numbers?
The ages of Geeta, Meera and Tina are in the ratio of 6:4:7 respectively. If the sum of their ages is 34 years, what is Meera’s age?
Three numbers give 290, 276 and 260 respectively when the average of any two is added to the remaining number. What is the difference between the highes...
Let βyβ be the smallest number divisible by 12, 20, 28, and 42, such that βyβ is a perfect square. What will be the remainder when βyβ is di...
- 60% of 'X' is (3/2) of 'Y'. Find the ratio X:Y, assuming X and Y are co-prime.