Laws of Motion Work Power Energy Laws of Motion 0% 35 12345 You will get 5 mins to solve 5 Questions. LAWS OF MOTION 1 / 5 1. A man fires a bullet of mass 200 g at a speed of 5 m/s. The gun is of one kg mass, by how much velocity the gun rebounds backwards 0.01 m/s 10 m/s 0.1 m/s 1 m/s 2 / 5 2. A mass M is suspended by a rope from a rigid support at P as shown in the figure. Another rope is tied at the end Q, and it is pulled horizontally with a force F. If the rope PQ makes angle q with the vertical then the tension in the string PQ is F / cos𝜃 F sin𝜃 F / sin𝜃 F cos𝜃 3 / 5 3. A fireman wants to slide down a rope. The breaking load for the rope is ¾ ᵗʰ of the weight of the fireman. With what minimum acceleration should he slide down g/4 g/8 g 3g/4 4 / 5 4. The kinetic energy of two masses m1 and m2 are equal their ratio of linear momentum will be √m₂ / m₁ m₁ /m₂ m₂ / m₁ √m₁ / m₂ 5 / 5 5. If rope of lift breaks suddenly, the tension exerted by the surface of lift (a = acceleration of lift) zero mg m(g+a) m(g﹣a) Your score is The average score is 37% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Exit Work Power Energy 9 12345 You will get 5 mins to answer 5 Questions. Best of Luck Work Power and Energy 1 / 5 1. In an elastic collision of two particles the following is conserved Total kinetic energy of both the particles Momentum of each particle Kinetic energy of each particle Speed of each particle 2 / 5 2. If the kinetic energy of a body becomes four times of its initial value, then new momentum will become four times its initial value becomes twice its initial value remains constant become three times its initial value 3 / 5 3. The work done in pulling up a block of wood weighing 2kN for a length of 10 m on a smooth plane inclined at an angle of 15ᴼ with the horizontal is (sin 15o = 0.259) 4.36 k J 8.91 k J 9.82 k J 5.17 k J 4 / 5 4. A particle of mass 0.1 kg is subjected to a force which varies with distance as shown in fig. If it starts its journey from rest at x = 0, its velocity at x = 12 m is 0 40 m/s 20√2 m/s 20√3 m/s 5 / 5 5. Two identical cylindrical vessels with their bases at same level each contains a liquid of density d. The height of the liquid in one vessel is h₁ and that in the other vessel is h₂. The area of either vases is A. The work done by gravity in equalizing the levels when the two vessels are connected, is (h₁﹣h₂)gd (h₁﹣h₂)gAd ½ × (h₁﹣h₂)² gAd ¼ × (h₁﹣h₂)² gAd Your score is The average score is 19% LinkedIn Facebook Twitter VKontakte 0% Restart quiz
