5. A body of mass 30kg weighs 60N on planet X. Which one of the following statements is true? A. The acceleration due gravity on X is greater than that on the earth.
B. The mass of the body is greater on X than it is on the earth
C. The acceleration due gravity on X is less than that on the earth
D. The mass of the body is less on X than it is on the earth.

Aspring with a mass of 2 kg has a damping constant 14 kg/s. a force of 3.6 n is required to keep the spring stretched 0.3 m beyond its natural length. the spring is stretched 0.6 m beyond its natural length and then released. find the position of the mass at any time t. (assume that movement to the right is the positive x-direction and the spring is attached to a wall at the left end.)

Let v1, v2, w be three linearly independent vectors in r 3 . that is, they do not all lie on the same plane. for each of the following (infinite) set of vectors, carefully sketch it in r 3 , and determine whether or not it is a vector space (i.e., a subspace of r 3 ). explain your reasoning

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?