Question
A person standing on a trolley moving in a straight line
throws a stone vertically upward, relative to himself, while facing in the direction of motion. Which of the following is true?Solution
When the person throws the stone vertically upward relative to himself , it means the stone initially has both a vertical velocity (from the throw) and a horizontal velocity equal to that of the trolley (since both the person and the stone were moving with the trolley before the throw).
- If the trolley moves with uniform velocity , there is no horizontal acceleration , so the stone maintains its horizontal motion and follows a vertical path relative to the person , landing back in his hand.
- However, if the trolley is accelerating forward , the stone—once released—is no longer in contact with the trolley and does not accelerate with it. So the trolley moves ahead during the stone’s flight, and the stone appears to fall behind the thrower.
Ajay spent 30% of his monthly income on rent and 44% of the remaining on food and the rest amount is saved by him which is Rs. 2548, then find the month...
Out of the total income of Priya, she spends 25% on food, 30% on rent and 25% on groceries. Out of the remaining income, she donates 10% in a charity an...
A candidate who gets 22% marks fails by 10 marks but another candidate who gets 40% marks gets 14% more than the passing marks. Find the maximum marks.
Out of a total of 200 students in a class, 60% are boys and the rest are girls. Out of the total number of students who appeared in the class test, 25% ...
A person sells each package of snacks for Rs. 13 each. On Monday, he sold 100 packages which was 32 more than that on Tuesday but 21 less than that on W...
- A company manufactured 20000 units where 30% of the units were mobile phones and the remaining units were accessories. If 85% of the mobile phones manufact...
The price of wheat has increased by 45%. Mohit has decided to spend only 16% more than what he initially did on buying wheat. What is the percentage dec...
A seller calculated his intended selling price at 6% profit on the cost of a product. However, owing to some mistake while selling, the units and tens d...
Partners A, B, and C invest Rs 10,000, Rs 15,000, and Rs 20,000 in a business. At the end of the year, the business generates a profit of Rs 45,000. A i...
Rakesh obtained 25% more marks than Ambuj Suresh obtained 52% less marks than Rakesh. Marks obtained by Suresh are what percent less than marks obtained...