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A 13 g bullet traveling 226 m/s penetrates a 2.0 kg block of wood and emerges cleanly at 162 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bulle
These blocks are allowed to move on a fixed block-wedge of angle θ = 30.0°. The coefficient of kinetic friction is 0.360 for both blocks. Draw free-body diagrams of both blocks and of the
A constant friction force tangential to its rim. The constant torque produced by this force is 73.0 N · m. Find the magnitude of the friction force.
A child slides down a slide with a 26° incline, and at the bottom her speed is precisely two-thirds what it would have been if the slide had been frictionless. Calculate the coefficient of kinet
Bowling ball traveling with constant spped hit the pins at the end of bowling lane 16.5 meters. The bowler hears the sound of ball hitting the pins 2.50 seconds after the ball is release from his ha
Tarzan (m = 81 kg) tries to cross a river by swinging from a 12.0 m long vine. His speed at the bottom of the swing, just as he clears the water, is 9.0 m/s. Tarzan doesn't know that the vine has a
A 89 kg water skier floating in a lake is pulled from rest to a speed of 10 m/s in a distance of 25 m. What is the net force exerted on the skier, assuming his acceleration is constant?
The resistance of the bulbs is 5.0 and 10.0 ohm. Sketch a neat diagram in each case and calculate the power consumed by each bulb if?
A horizontal pipe contains water at a pressure of 111 kPa flowing with a speed of 1.8 m/s. The pipe narrows to one-half its original diameter. What are the speed and the pressure of the water when
A worker drops a wrench from the top of a tower 89.0 m tall. With what velocity does the wrench strike the ground? (Assume the positive direction is upward.)
At some instant an electron located 0.15 m away from the wire is moving toward the top of the page with a speed of 5.2 × 104 m/s. Calculate the magnetic force on the electron.
A banked circular highway curve is designed for traffic moving at 81 km/h. The radius of the curve is 167 m. Traffic is moving along the highway at 42 km/h on a rainy day. What is the minimum coeffi
Winds pick up suddenly, increasing the wave's amplitude to 6 m. How does this change in amplitude affect the wave's frequency and the amount of energy it transports?
The focal length of a relaxed human eye is approximately 1.52 cm. When we focus our eyes on a close-up object, we can change the refractive power of the eye by about 13 diopters. Calculate the focal
Calculate how much charge must be placed on the surface of a sphere of radius 0.31 m for the electric potential just above the surface to be 100 V. Assume that the charge is uniformly distributed.
A car with a vertical radio antenna 75 cm long drives due west at 24 m/s. Find the induced emf between the ends of the antenna.
How much heat will flow through the glass in 1.00 h if there is a temperature difference of 2 C° between the inner and outer surfaces?
An electron is released from rest in a vacuum between two flat, parallel metal plates that are 11.0 cm apart and are maintained at a constant electric potential difference of 620 Volts. If the elect
The 40 kg man in the roller coaster car is sitting on a bathroom scale. If he is traveling at 35.3 m/s at the point shown and the radius of the vertical coaster track is 53 meters, to the nearest n
A baseball outfielder throws a 0.150 kg baseball at a speed of 41.0 m/s and an initial angle of 33.0°. What is the kinetic energy of the baseball at the highest point of its trajectory?
a weight lifer llifts a set of weighjts a vertical distance of 2.00 m . if a coinstant net force of 350 N is exerted on the weights , what is the net workdone on the weights.
an object weighs 315 N in air. when tied to a string connected to a balance, and immersed in water, it weighs 265 N. When it is immersed in oil, it weighs 269 N. Find the following:
Three equal point charges, each with charge 1.15 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.600 m. What is the electric potential energy U of the system?
A driver in a car traveling at a speed of 73 km/h sees a cat 115 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 112 m?
A 13 kg child on a playground swing moves with a speed of 3.6 m/s when the 6.0 m long swing is at its lowest point. What is the angle that the swing makes with the vertical when the child is at the