Download SI Physics 221

SI Physics 221
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Worksheet 2.9 Electrostatics Continued, and Review
1) True/False. An uncharged particle that enters an electric field will not experience
a force from that field.
2) Find the electric field on a point p, located 10cm from a cable. The cable is 100m
long, and has a charge of 6 C uniformly distributed across its length, and a diamer
of 4mm.
3) A electron is located in the midpoint between two fixed charges of –2μC and 4μC.
What is the magnitude of the electrons acceleration? Which way does it go?
4) A charged particle carrying charge of -1μC, enters a uniform field of 20N/C. The
particle’s motion is perpendicular to the field it enters. If the particle has an initial
height of 2 meters, and is traveling at a velocity of 80m/s how far does it travel
before it hits the ground?
Review Questions:
5) You wish to launch a satellite into space, and you want the satellite to orbit the
earth at a distance of 8x103km from its surface. How fast must you launch the
satellite in order for it to reach this height? How fast must the satellite be moving
around the earth in order to maintain this height?
6) A mass is attached to a spring and is oscillating back and forth. The mass is 6kg,
and when the spring is in equilibrium the mass’s velocity is 3m/s. The spring has
a constant k=120N/M. If the phase angle φ is π/3, what is the spring’s position at
t=0s?