Coulomb's Law

Three very large square planes of charge are arranged as shown (on edge) in Fig. 21-70. From left to right, the planes have charge densities per unit area of -0.50 µC/m2, +0.10 µC/m2, and -0.40 µC/m2. Find the total electric field (direction and magnitude) at the points A, B, C, and D. Assume the plates are much larger than t ...continues

Circular Motion

A 200g object is moving in a circle of radius 4m with a uniform speed of 6m/s. The net force acting on the object is.... a. 1.8N towards the center of the circle b. 1.8N tangential of the circle c. 3.6N towards the center of the circle d. 1.8N away from the center of the circle.

Acceleration of an Object

An object is moving in a circular path of radius 1m with a uniform speed of 1.0 * 10^6 m/s. The acceleration of the object has a magnitude of... a. 1.0 * 10^12 m/s^2 b. 1.0 * 10^6 m/s^2 c. 1.0 * 10^3 m/s^2 d. 0

Coulomb's Law

Vo = 1.0X10^7 At what angle will the electrons leave the uniform electric field at the end of the parallel plates (point P in Fig. 21-40)? Assume the plates are 5.4 cm long and E = 5.6 10^3 N/C. Ignore fringing of the field. (counterclockwise from the x axis is positive) Please see attached for diagram.

magnitude of the impulse

a bullet, of mass 20g, traveling at 350 m/s, strikes a steel plate at an angle of 30degrees with the plane of the plate. it ricochets off at the same angle, at a speed of of 320 m/s. What is the magnitude of the impulse that the wall gives to the bullet? a. 300 Ns b. 0.3 Ns c. 0.52 Ns d. 6.7 Ns

how fast is the bullet

How fast must a 10.5g bullet be traveling when it strikes a ballistic pendulum that sonsist of a block of wood of mass 3.0kg that is suspended by a cord? The bullet gets embedded in the block. The block rises by .22m after the impact. a. 143 m/s b. 595 m/s/s c. 595 m/s d. 2.67 m/s

what is conserved

Two cars suffer a head- on collisoin. what is conserved in the collision? a.momentum b.mechanical energy and momentum c.none of these d. kinetic energy

Momentum of a particle

The momentum of a particle is proportional to the square of its velocity. True or false?

mementum of the ball

a 3kg ball of putty moving at 1 m/s collides and sticks to a 2kg ball initially at rest. the putty and ball then move with a momentum of: a. 0 Ns b. 2 Ns c. 4 Ns d. 1 Ns

final total momentum

in an inelastic collision, the final total momentum is: a. more than the initail momentum b. the same as the initial momentum c. none of these d. less than the initial momentum