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A 0.100-kilogram white ball moving with a velocity of 5 meters/second along the positive x-axis hits a stationary blue ball of the same mass. Energy is not necessarily conserved, but momentum is. After the collision, the white ball moves off at an angle of 20° with respect to the positive x-axis and at a velocity 3.5 meters/second. The blue ball moves at an angle of -35° and a velocity of 2.1 meters/second. What is the final y-momentum of the system?
A potter's wheel having a radius 0.55m and a moment of inertia 12.5 kg·m2 is rotating freely at 55rev/min. The potter can stop the wheel in 6s by pressing a wet rag against the rim and exerting a radially inward force of 68 N.
Two insulated wires, each 2.50 m long, are taped together to form a two-wire unit that is 2.50 m long. One wire carries a current of 7A; the other carries a smaller current I in the opposite direction. The two wire unit is placed at an angle of 78..
A plane leaves the airport in Galisto and flies 165 at 68.0 east of north and then changes direction to fly 230 at 48.0 south of east, after which it makes an immediate emergency landing in a pasture.
A 15 g rifle bullet traveling 205 m/s buries itself in a 3.4 kg pendulum hanging on a 2.6 m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of the pendulum's displacement.
A 47.60 g golf ball is driven from the tee with an initial speed of 56.0 m/s and rises to a height of 28.4 m. (a) avoid air resistance and determines the kinetic energy of ball at its highest point. (b) What is its speed while it is 8.02m below it..
A heat engine runs in the cycle A to B to C and back to A. The pressure at C is 200 kPa. The volume at C is 20 liters.
An elevator has a downward acceleration of 1 m/s2. A person, having a weight of 800 N as measured by a scale at rest on the ground, steps on a scale in the elevator. What does the scale read? A) 0 N. B) Approximately 80 N. C) Between 80 N and 800 ..
A 60-kg basketball is dropped out of a window that is 6.1m above the ground. The ball is caught by a person whose h&s are 1.5m above the ground. Find gravitational potential energy of the ball.
A 4.0 kg block is released from rest at the top of a 30 degree frictionless incline. The block makes a head on elastic collision with another 3.0 kg block initially at rest on a horizontal surface at the bottom of the incline.
The rms electric field of an electromagnetic wave increases from 286 to 858 N/C.find the wave intensities for the two values of the electric field.
Show that the boundary conditions far away from the cylinder
The car encounters a loop of radius R = 18 m at ground level. As you will learn in the course of this problem, the initial height 54.00 m is great enough so that the car never loses contact with the track.
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