Advertisements
Advertisements
Question
Answer the following question.
In the following table, every entry on the left column can match with any number of entries on the right side. Pick up all those and write respectively against A, B, C and D.
| Name of the force | Type of the force | ||
| A | Force due to tension in a string | P | EM force |
| B | Normal force | Q | Reaction force |
| C | Frictional force | R | Conservative force |
| D | Resistive force offered by air or water for objects moving through it. | S | Non-conservative force |
Solution
- Force due to tension in a string: Electromagnetic (EM) force, reaction force, non-conservative force.
- Normal force:
Electromagnetic (EM) force, non-conservative force, Reaction force - Frictional force:
Electromagnetic (EM) force, reaction force, non-conservative force. - Resistive force offered by air or water for objects moving through it:
Electromagnetic (EM) force, non-conservative force.
APPEARS IN
RELATED QUESTIONS
Among the four fundamental forces, only one force governs your daily life almost entirely. Justify the statement by stating that force.
Find the odd man out:
Answer the following question.
Distinguish between real and pseudo force.
Answer the following question.
Distinguish between conservative and nonconservative forces.
Answer the following question.
State the formula for calculating work done by a force. Are there any conditions or limitations in using it directly? If so, state those clearly. Is there any mathematical way out for it? Explain.
Solve the following problem.
As I was standing on a weighing machine inside a lift it recorded 50 kg wt. Suddenly for a few seconds, it recorded 45 kg wt. What must have happened during that time? Explain with complete numerical analysis.
40000 litre of oil of density 0.9 g/cc is pumped from an oil tanker ship into a storage tank at 10 m higher level than the ship in half an hour. What should be the power of the pump?
Solve the following problem.
Two galaxies of masses 9 billion solar mass and 4 billion solar mass are 5 million light-years apart. If, the Sun has to cross the line joining them, without being attracted by either of them, through what point it should pass?
Variation of a force in a certain region is given by F = 6x2 – 4x – 8. It displaces an object from x = 1 m to x = 2 m in this region. Calculate the amount of work done.
Two bodies A and B of equal mass are suspended from two separate massles springs of force constant k1 and k2, respectively. The bodies oscillate vertically such that their maximum velocities are equal. The ratio of the amplitudes of body A to that of body B is ______.
If W1, W2 and W3 represent the work done in moving a particle from A to B along three different paths 1, 2 and 3 (as shown in fig) in the gravitational field of the point mass 'm'. Find the correct relation between W1, W2 and W3.
Two particles of mass m1 and m2, approach each other due to their mutual gravitational attraction only. Then ______.
A body of mass 'm' begins to move under the action of time-dependent force `vec"F" = ("t"hat"i" + 2"t"^2hat"j")`N where `hat"i" and hat"j"` are unit vectors along x and y axis respectively. The power developed by the force in watt at time 't' is ______.
Work done in sliding a 1 kg block up a rough inclined plane of height 5 m is 100 J. Work done against the friction is ______.
(g = 10 m/s2)
A Diwali cracker releases 25 gram gas per second, with a speed of 400 ms-1 after explosion. The force exerted by gas on the cracker is ______.
'n' number of balls each having mass 'm' and velocity 'u' hit a wall elastically and normally in 2 seconds. The force exerted by them on the wall is ______.
Out of the fundamental forces in nature, maximum and minimum range is respectively for ______.
Two rods of same length and transfer a given amount of heat 12 second, when they are joined as shown in figure (i), But when they are joined as shown in figure (ii), then they will transfer same heat in same conditions in ______.
A gardener pushes a lawn roller through a distance of 20 m. If he applies a force of 30 kg-wt in a direction inclined at 60° to the ground, the work done by the gardener in pushing the roller is ______.
`["g" = 9.8 "m""/""s"^2, sin30^circ = cos60^circ = 1/2, cos30^circ = sin60^circ = sqrt3/2]`
Which of the following statements is correct?
