Q. Force of 50 N acting on a body at an angle θ with horizontal. If 150 J work is done by displacing it 3 m, then θ is 1) 60° 2) 30° 3) 0° 4) 45° Answer: 3) 0° Solution: The horizontal compo... Read more
Q. A spring stores 1 J of energy for compression of 1 mm. The additional work to be done to compress it further by 1 mm is 1) 1 J 2) 2 J 3) 3 J 4) 4 J 5) 0.5 J Answer: 3) 3 J Solution: W1 =... Read more
Q. A ball is dropped from a height of 20 m. If the coefficient of restitution is 0.9, what will be the height attained after the first bounce? 1) 1.62 m 2) 16.2 m 3) 18 m 4) 14 m Answer: 2)... Read more
Q. For inelastic collision between two spherical rigid bodies 1) the total kinetic energy is conserved 2) the total mechanical energy is not conserved 3) the linear momentum is not conserved... Read more
Q. If the heart pushes 1 cc of blood in 1 s under pressure 20000 Nm-2, the power of the heart is 1) 0.02 W 2) 400 W 3) 5 × 10-10 W 4) 0.2 W Answer: 1) 0.02 W Solution: Given, Pressure, P = 2... Read more