Two balls of masses 2 g and 6 g are moving with kinetic energy in the ratio of 3: 1. What is the ratio of their linear momenta?
1) 1: 1 2) 2: 1 3) 1: 2 4) None of these Answer: 1) 1 : 1 Solution: Kinetic energy... View Article
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A cubical vessel of height 1 m is full of water. What is the amount of work done in pumping water out of the vessel? (take, g =10 ms-2)
1) 1250 J 2) 5000 J 3) 1000 J 4) 2500 J Answer: Mass of water in the cubical vessel=... View Article
A ball dropped from a height of 2 m rebounds to a height of 1.5 m after hitting the ground. Then, the percentage of energy lost is
1) 25 2) 30 3) 50 4) 100 Answer: 1) 25 Solution: Percentage of energy loss = [mg (2 – 1.5)/mgh]... View Article
The magnitude of momentum of particle is increased by 100%. The increase in its kinetic energy is
1) 100% 2) 200% 3) 300% 4) 400% Answer: 3) 300% Solution: Kinetic Energy, K.E = p2/2m p = momentum m... View Article
A shell of mass 20 kg at rest explodes into two fragments whose masses are in the ratio 2 : 3. The smaller fragment moves with a velocity of 6 ms-1. The kinetic energy of the larger fragment is
1) 96 J 2) 216 J 3) 144 J 4) 360 J Answer: 1) 96 J Solution: The ratio of the... View Article
A rod AB of mass 10 kg and length 4 m rests on a horizontal floor with end A fixed so, as to rotate it in a vertical plane about a perpendicular axis passing through A. If the work done on the rod is 100 J, the height to which the end B be raised vertically above the floor is
1) 1.5 m 2) 2 m 3) 1 m 4) 2.5 m 5) 3 m Answer: 2) 2 m Solution: Work... View Article
A spring of spring constant 5 x 103 Nm-1 is stretched initially by 5 cm from the unstretched position. Then the work required to stretch it further by another 5 cm is
1) 12.50 N–m 2) 18.75 N–m 3) 25 N–m 4) 6.25 N–m Answer: 2) 18.75 N–m Solution: Work done, W1 =... View Article
The area under the displacement-force curve gives
1) distance travelled 2) total force 3) momentum 4) work done Answer: 4) work done Solution: Work done = force... View Article
PM MITRA Parks [Govt Schemes for UPSC]
The government has approved the setting up of seven PM MITRA Parks with an outlay of Rs. 4,445 crores for... View Article
if-the-sides-of-a-triangle-are-produced-in-order-prove-that-the-sum-of-the-exterior-angles-so-formed-is-equal-to-four-right-angles
Solution: The triangle ABC in which the sides AB, BC and CA produced to points F, D, and E. We... View Article
in-the-given-fig-poq-is-a-line-ray-or-is-perpendicular-to-line-pq-os-is-another-ray-lying-between-rays-op-and-or
Solution: Given OR perpendicular to PQ. ∠POR = ∠ROQ ∠QOS = ∠ROQ + ∠ROS = 900 + ∠ROS …(i) ∠POS... View Article
What is a lagoon? Give examples.
A lagoon is a shallow body of water protected from a larger body of water (usually the ocean) by sandbars,... View Article
How are lagoons formed?
A lagoon is a shallow body of water protected from a larger body of water (usually the ocean) by sandbars,... View Article
What are examples of water resources?
Some examples of water resources are surface water resources like rivers, lakes, ponds and tanks and groundwater. The availability of... View Article
What are the sources of water pollution?
The most significant sources of water pollution are : Sewage (Waste Water):The sewage water carries pathogens, a typical water pollutant,... View Article
What are the major water resources?
Major water resources in India are surface water resources like rivers, lakes, ponds and tanks, and groundwater. The mean annual... View Article
What are the common property resources of rural areas?
The CPRs have traditionally been a source of economic sustenance of the rural poor and have played an important resource-supplementing... View Article
Which land comes under common property resources?
Common property resources include all such resources that are meant for the common use of the villagers. CPRs include all... View Article
Why common property resource is important?
Common property resource is important because it provides fodder for the livestock and fuel for the households along with other... View Article
What is a common property resource?
CPRs can be defined as a community’s natural resource, where every member has the right of access and usage with... View Article
