17. Two masses, m1 and m2 are separated a distanced. What changes in the variables will result in no change in the
gravitational force between the masses?.
(More than one answer is correct)
a. m1 is double and dis doubled.
b. m2 is tripled and dis quadrupled.
c. Both m1, and m2 are tripled and dis tripled.
d. m2 is quadrupled and d is doubled.

The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.

Ahorizontal force of 400.0 n is required to pull a 1760 n truck across the floor at a constant speed. find the coefficient of sliding friction.