Reference no: EM139013
Q1. A ball on a porch rolls 60 cm to the porch's edge, drops 40 cm, continues rolling on the grass, and ultimately stops 80 cm from the porch's edge.
Q2. 1) A ball of mass 1.020 g and positive charge q =45.2 microC is suspended on a string of negligible mass in a uniform electric field. We view that the ball hangs at an angle of theta=15.0 from the vertical. What is the magnitude of the electric field?
2) Two charges, Q1= 3.10 micro Coulombs, and Q2=6.70 micro Coulombs, are located at points (0,-3.50cm) and (0, +3.50cm).
What is the magnitude of the electric field at point P, located at (5.00cm, 0), due to Q1 alone?
What is the x-component of total electric field at P?
What is the y-component of total electric field at P?
What is the magnitude of total electric field at P?
Now let Q2=Q1= 3.10 micro Coulombs. Note that the problem now has a symmetry that you should exploit in your solution. What is the magnitude of the total electric field at P?
Given the symmetric situation of the previous problem, what is the magnitude of the force on an electron placed at point P?
3) An electron (mass m = 9.11×10-31kg) is accelerated in the uniform field E (E = 1.42×104N/C) between two parallel charged plates. The separation of the plates is 1.68cm. The electron is accelerated from rest near the negative plate and passes through a tiny hole in the positive plate. With what speed does it leave the hole?
4) Show that the gravitational force can be ignored by calculating the ratio of the gravitational to the electric force. Compute the ratio.
|
Produces kumquats and imports them
: Assume which the United States presently both produces kumquats and imports them.
|
|
Assume the engine delivers the same power
: A snowmobile climbs a hill at velocity v-up. The slope of the hill is a 2 ft rise for every 70 ft of distance. The resistive force of the snow is equal to 4.12 percent of the weight of the snowmobile. How fast will the snowmobile move downhill, assum..
|
|
Where is the center of mass of the assembly (x, y)
: The frequency of an opera singer is 450 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer who is running down the road towards the opera singer with a speed 25.0 m/s.
|
|
How much time elapses before compass hits the ground
: A space vehicle is coasting at a constant velocity of 28.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.523 m/s2 in the +x direction.
|
|
What is the x-component of total electric field at p
: A ball of mass 1.020 g and positive charge q =45.2 microC is suspended on a string of negligible mass in a uniform electric field. We view that the ball hangs at an angle of theta=15.0 from the vertical. What is the magnitude of the electric field.
|
|
He block stays in contact with the spring is
: You are driving to grocery store at 15 m/s .You is 140 m from an intersection when the traffic light turns red. Suppose that your reaction time is 0.70 s. and that your car brakes with constant acceleration. How far are you from the intersection whil..
|
|
A suitcase drops out of the luggage compartment
: A ball of mass 1.024 g and positive charge q =40.3microC is suspended on a string of negligible mass in a uniform electric field. We observe that the ball hangs at an angle of theta=15.0o from the vertical. What is the magnitude of the electric field..
|
|
What is the tension of each of these wires
: Mike pulls a sled across level snow with force of 235 N along a rope that is 35.5° above the horizontal. If the sled moved the distance of 75.0 m, how much work did Mike do.
|
|
At what angle is the rope held
: What approximations or simplifying assumptions must you make in the calculations? (Note: Some of these choices are false because they are wrong physics!)
|