A) An electron is moving east in a uniform electric field of 1.48 N/C directed to the west. At point A, the velocity of the electron is
4.55
×
10
5
m/s pointed towards the east.

What is the speed of the electron when it reaches point B which is a distance of 0.370 m east of point A?

B) A proton is moving in the uniform electric field of part (A), at which point A, the velocity of the proton is
1.91
×
10
4
m/s, again points towards the east.

What is the speed of the proton at point B?

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Brutus, the dog, is pulling a bone to the left with a force of 20 n. lassie, another dog, is pulling a bone to the right with a force of 18n. what is the net force? a. b. c.

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?