14 A particle of mass m strikes a vertical rigid wall perpendicularly from the left with velocity v. rigid wall
If the collision is perfectly elastic, the total change in momentum of the particle that occurs as a
result of the collision is
A. 2mv to the right.
B. 2my to the left.
C. my to the right.
D. my to the left.

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)

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