The mass and related weight on the respective objects on four different planets is
4 kg, 40n, earth
6 kg, 24n, mars
2 kg, 50n, jupiter
4 kg, 36n, venus
a) based on the information given, explain why the gravitational force on earth is stronger than on venus.(3%)
b) explain the relationship between the weight and the gravitational force of the planet on the object.(2%)
c) predict what will happen if the mass of the four planets is the same(3%)

If this plastic cup is heated to its melting point, what will eventually happen to all the particles in the plastic? a. the particles will begin to move enough that they slide past each other. b. bonds will form and the liquid will become a solid. c. the spaces between the particles will get smaller. d. the particles will change state and become a crystalline solid.

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?