An object will slow down if there is no net force.

"Common-sense concepts about motion," I. A. Halloun and D. Hestenes, Am. J. Phys. 53, 1056-1065 (1985).

The motion will follow the path of the stronger force on the object.

"Common-sense concepts about motion," I. A. Halloun and D. Hestenes, Am. J. Phys. 53, 1056-1065 (1985).

Passive forces don't exist (tables don't exert a normal force).

"Common-sense concepts about motion," I. A. Halloun and D. Hestenes, Am. J. Phys. 53, 1056-1065 (1985).

Normal forces won't exceed the weight (active force) on an object.

"Student understanding in mechanics: A large population survey," R. F. Gunstone, Am. J. Phys. 55, 691-696 (1987).

An object with a constant net force will have a constant speed.

"Common-sense concepts about motion," I. A. Halloun and D. Hestenes, Am. J. Phys. 53, 1056-1065 (1985).

Faster moving objects have a larger force acting on them.

"Common-sense concepts about motion," I. A. Halloun and D. Hestenes, Am. J. Phys. 53, 1056-1065 (1985).

A constant force accelerates a body, until the body uses up all the power of the force.

"Common-sense concepts about motion," I. A. Halloun and D. Hestenes, Am. J. Phys. 53, 1056-1065 (1985).

The net force must be in the direction of motion, so objects will travel along a line in that direction.

"Common-sense concepts about motion," I. A. Halloun and D. Hestenes, Am. J. Phys. 53, 1056-1065 (1985).

"Student understanding in mechanics: A large population survey," R. F. Gunstone, Am. J. Phys. 55, 691-696 (1987).

"Student preconceptions about vector kinematics," J.M. Aguirre, Phys. Teach. 26, 212-216 (1988).

Objects can be trained to follow a certain path by forces, and will continue along that path, even after the forces are removed.

"Common-sense concepts about motion," I. A. Halloun and D. Hestenes, Am. J. Phys. 53, 1056-1065 (1985).

"Naive beliefs in "sophisticated" subjects: misconceptions about trajectories of objects," Caramazza, A. McCloskey, M., and Green, B., Cognition 9, 117-123 (1981).

Heavier objects fall faster than light objects.

"Common-sense concepts about motion," I. A. Halloun and D. Hestenes, Am. J. Phys. 53, 1056-1065 (1985).

Objects will point in the direction of their velocity.

"Student preconceptions about vector kinematics," J.M. Aguirre, Phys. Teach. 26, 212-216 (1988).

Force must be positive, plotted above the time axis.

"Student difficulties with graphical representations of negative values of velocity," F. M. Goldberg and J. H. Anderson, Phys. Teach. 27, 254-260 (1989).

Strings transmit (unchanged) an external force acting on one object to another object.

"Research as a guide for teaching introductory mechanics: An illustration in the context of the Atwood's machine," L.C. McDermott, P. S. Shaffer, and M. D. Sommers, Am. J. Phys. 62, 46-55 (1994).

"Student understanding in mechanics: A large population survey," R. F. Gunstone, Am. J. Phys. 55, 691-696 (1987).

The tension in a string is the sum of the forces acting on each end.

"Research as a guide for teaching introductory mechanics: An illustration in the context of the Atwood's machine," L.C. McDermott, P. S. Shaffer, and M. D. Sommers, Am. J. Phys. 62, 46-55 (1994).