The value of G, the universal gravitational constant, was measured experimentally by:

Q-1; The value of G, the universal gravitational constant, was measured experimentally by:

1) Newton
2) Cavendish
3) Copernicus
4) Kepler
ANSWER: 2 -- CAVENDISH

Q-2; Two steel balls are at a distance S from one another. As the mass of ONE of the balls is doubled, the gravitational force of attraction between them is:

1) quartered
2) halved
3) doubled
4) quadrupled
ANSWER: Y -- DOUBLED

Q-3; If the distance between the earth and moon were halved, the force of the attraction between them ould be:

1) one fourth as great
2) one half as great
3) twice as great
4) four times as great
ANSWER: 4 -- FOUR TIMES AS GREAT

Q-4;  As a 10 kilogram mass on the end of a spring passes through its equilibrium position, the kinetic energy of the mass is 20 joules. The speed of the mass is:

1) 2.0 meters per second
2) 4.0 meters per second
3 5.0 meters per second
4) 6.3 meters per second
ANSWER: 2 -- 2.0 METERS PER SECOND