Question
What would happen to the weight of a body in a lift
moving upward with uniform speed?Solution
Weight of a body depends on the force of gravity acting upon it. In a lift stationary or moving with uniform speed (not with acceleration) the apparent weight of body is equal to its true weight. Because here the weight will be calculated as. m{g-(a)}, where m is the mass of body g is the acceleration produced due to force of gravity which is 9.8m/s² and a would be the acceleration due to the movement of lift. With uniform speed movement, the acceleration due to lift would be 0 here. Hence , option C is correct.
- A total of Rs. ‘K’ was to be distributed among L, M, and N in ratio of 2:5:3 respectively but due to some reason the money was falsely distributed in r...
The ratio of two numbers is 5:11. If each number is decreased by 2, the ratio becomes 4:9. Find the smaller numbers.
In an office, the ratio of the number of males to number of females is 9:4. If 2 males joined the class and 8 females left the class, then the ratio of ...
- Find the fourth proportion of (2k - 5), (k + 1), and (3k + 4). (Note: 'k' is the smallest two-digit prime number.)
A person distributes Rs. 61,600 among 11 men, 13 women and 3 children. If each woman receives four times as much as each children and each man receives ...
Total population of city P and Q is 3360 and 4850 respectively. If the ratio of number of males to females in city is P and Q is 5:3 and 3:2 respectivel...
A sum of money is divided among P, Q, R and S in the ratio of 3:4:8:9 respectively. If the share of R's is Rs. 2600 more than the share of Q, then what ...
A box contains the coins of 5p, 10p and 25p are in the ratio 3:4:6. If there is Rs. 164 in all, how many 10p coins are there?Â
90 percent of first number is equal to 40 percent of the second number. What is the respective ratio of the first number to the second number?
A seller sold three types of fruits i.e. apples, bananas, and oranges. The number of apples sold is 30% of the total number of fruits sold, and the rati...
Relevant for Exams:
