ETEA PAST PAPER 2020 ETEA 2020 ( PART 2 ) 1. At what angle of projection of a projectile the range becomes half of its maximum value? 20° 15° 40° 30° 2. The newton-second is unit of: Momentum Impulse Work Power 3. A 1.75m heighted weight- lifter raises weight with a mass of 50kg to a height of 0.5m above his head, how much work is being done by him? (g = 10m/s-2) 1125 J 50 J 2125 J 250 J 4. What is the speed of 2.0 kg metallic bob at the mean position of a simple pendulum, when released from its extreme position 0.5 m height ? (g = 10m/s-2) 3.16 ms-1 100 ms-1 10 ms-1 50 ms 1 5. When the speed of your car is halved, by what factor does its kinetic energy decrease? 1/2 1/6 1/4 1/8 6. Which one of the following forces is a non conservative force? Gravitational force Elastic spring force Electric force Frictional force 7. The earth rotates on its axis once a day. Suppose, by a dome process the earth contracts so that its radius is only half as large as at present, then how long will the earth take to complete its rotation? 12 hours 18 hours 24 hours 6 hours 8. 1 radian is equal to: 57.1° 57.2° 57.4° 57.3° 9. The slope of distance – time graph will always be: Maximum Zero Positive Negative 10. If we drop an object, its initial velocity is zero. How far will it fall in time ‘t’? 9.8 t2 0.49 t2 98 t2 4.9 t2 Loading … Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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