Electricity and Magnetism Answers

A hockey puck having a mass of 0.30 kg slides on the horizontal, frictionless surface of an ice rink. Two hockey sticks strike the puck simultaneously, exerting the forces on the puck shown in Figure below. The force F1 has a magnitude of 5.0 N, and the force F2 has a magnitude of 8.0 N. Determine both the magnitude and the direction of the puck’s acceleration

A particle starts from the origin at t = 0 with an initial velocity having an x component of 20 m/s and a y component of -15 m/s. The particle moves in the xy plane with an x component of acceleration only, given by ax = 4.0 m/s2. (a) Determine the components of the velocity vector at any time and the total velocity vector at any time. (b) Calculate the velocity and speed of the particle at t = 5.0 s. (c) Determine the x and y coordinates of the particle at any time t and the position vector at this time.

A commuter airplane takes the route shown in Figure 3.20. First, it flies from the origin of the coordinate system shown to city A, located 175 km in a direction 30.0° north of east. Next, it flies 153 km 20.0° west of north to city B. Finally, it flies 195 km due west to city C. Find the location of city C relative to the origin.

Each of two small spheres is charged positively, the total charge 52.6 micro C. Each sphere repelled from the other with force of 1.19 N. when the spheres are 1.94 m apart. Calculate the charge on each sphere.

A ball of mass m1 and a block of mass m2 are attached by a lightweight cord that passes

over a frictionless pulley of negligible mass, as in figure below. The block lies on a frictionless incline of

angle θ. Find the magnitude of the acceleration of the two objects and the tension in the cord.

I'm thinking of making a contraption that can produce electricity by the 'wind' cars produce while the car is moving. My idea is that i build some cylidrincal contraption that can be fitted onto the light poles on highways so that the wind of the cars can rotate the cylinder. The cylinder consists of two layers. The inner layer is fitted onto the light pole with magnets and the outer layer consists of the copper coil that rotates to cut the magnetic flux to produce an induced current. My question is is there any way to let the outtrt layer rotate freely and how to connect the wires so that it wont get entagled when the outer layer is rotating. Thanks!

Two charges are placed on the x-axis. One of the charges (q1 = +9.0 µC) is at x1 = +3.2 cm and the other (q2 = -24 µC) is at x2 = +8.1 cm.

(a) Find the net electric field (magnitude and direction) at x = 0 cm. (Use the sign of your answer to indicate the direction along the x-axis.)

(b) Find the net electric field (magnitude and direction) at x = +5.7 cm. (Use the sign of your answer to indicate the direction along the x-axis.)

A 60.2 kg skier rides a 831.5 m long lift to the top of a mountain. The lift makes an angle of 16.8o with the horizontal. How much work needs to be done on the skier to get her to the top of the mountain?

q1= 20nC, q2=10nC located on the x axis. x=0 and x=1 meter respectively. Where on the x axis is electric field zero?

how to like currents attract each other and how to unlike currents repull each other?