Question

nce and Technology Part 1 Que 1: Choose the correct option in the multiple choice answer for the following questions:( 1 mark each) 1) A ……. Is necessary to change the speed as well as the direction of motion of an object. a) force b) inertia c) momentum d) motion 2) The orbit of a planet revolving around a star is …… a) circular b) linear c) towards the focal point d) elliptical 3)The square of its period of revolution around the sun is directly proportional to the ……….. of the mean distance of a planet from the sun. a) square b) square root c) cube d) cube root 4) The gravitational force between two bodies is directly proportional to the product of the masses of those bodies and is ……….of the distance between them. a) inversely proportional to the square b) directly proportional to the square c) inversely proportional to the cube d) inversely proportional to the square root 5) The value of universal gravitational constant (G) in SI unit is………… a) 6.673× 10-11 Nm2/ kg2 b) 6.673× 1011 Nm/ kg c) 9.673 × 10-11 Nm/ kg d) 9.673 × 10-11 Nm2/ kg2 6) The ……………..force is much weaker than other forces in nature. a) gravitational b) electromagnetic c) nuclear force d) inter molecular 7) The value of gravitational acceleration (g) is ……….. a) highest at the poles b) highest at the equator c) same everywhere on the surface of the earth d) lowest at the poles 8) The value of gravitational acceleration(g) is …………at the equator. a) 9.78 m/s2 b) 9.832 m/s2 c) 9.8 m/s2 d) 6.67 m/s2 9) The free fall of an object is possible only in……. 1/6 a) air b) vacuum c) on the surface of earth d) None of these 10) The weight of any object on the moon is nearly …………of the weight of the earth. a) b) 1/8 c) 1/2 d) 2/6 11) A person weighs 60N on earth. His weight on the moon will be…… a)360N b) 60N c) 6N d) 10N 12) Dobereiner laid down the…..rule.​

Answer 1

Answer:

1] Force

2] elliptical

3] cube

4] inversely proportional to the square