Question
What is the work done by a centripetal force on an
object moving in a circular path at constant speed?Solution
The work done by a centripetal force is zero because the force acts perpendicular to the direction of motion, meaning there is no displacement in the direction of the force.
- A bank offers interest at the rate of 10% per annum, compounded half yearly. Find the interest received at the end of the year on a sum of Rs. 30000.
Mark invested Rs 15,000 in a scheme at simple interest 20% per annum. After three years he withdrew the principal amount plus invested the entire amount...
Virendra invested Rs. 2600 at 20% p.a. simple interest for 3 years. After 3 years, he invested the amount received by him at the 20% p.a. compound inter...
A certain sum of money becomes 3000 in 6 years and Rs. 4000 in 10 years at any certain rate of simple interest. Find the principal amount.
Rs 2000 are invested at 5% p.a simple interest. If the interest is added to the principal after every 10 years, the amount will become Rs 4000 after
Rs. 13000 invested for 2 years in a scheme offering compound interest (compounded annually) of 15% p.a. gives an interest that is Rs. 10 less than the i...
Rs.13000 was invested for 2 years in scheme A which offers compound interest at 10% per annum. What approximate interest earned on investing the amount ...
Rs. (2x + 400) is invested at a rate of 20% per annum, yielding an interest of Rs. 3200 after 4 years. Calculate the interest earned when Rs. (x + 100) ...
If ₹15,600 is invested at a simple interest rate of (a + 12)% per annum and doubles in value over 5 years, determine the value ...
A farmer wants to divide Rs 2,81,800 between his sons , who are 17 and 19 years old respectively, in such a way that the sum divided at the rate of 12% ...
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