1.
If Earth's radius and mass were both twice their present values, the acceleration due to gravity at
Earth's surface would have a value of 2 m's 3, law states that the magnitude of the force exerted
by an ideal spring is directly proportional to the distance the spring moves from equilibrium The
change in momentum of an object is called the 4. A ball is dropped and bounces back to 90% of
its original height. The collision between the ball and the ground was 6. 7. The force of attraction
between all objects with mass is called One charge freely moves away from another charge. The
force between the two charges changes while total energy is 8. The bending of a wave due to
changing speed is called 9. Energy radiates from an atom in bundles called 0. A decay that
involves a high speed electron is a(n)decay. il. The time required to reduce radioactivity by 50%
is the
Solution
2.
M = mass of earth
R = radius of earth
acceleration due to gravity is given as
g = GM/R 2
as mass and radius is made twice , new acceleration due to gravity is given as
g' = G (2M) /(2R) 2
g' = (0.5) GM/R 2
g' = (0.5) g
hence the acceleration due to gravity becomes half
3.
Hooke's law

2.
4.
Impulse
5.