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A freight train has a mass of 1.8 107 kg. If the locomotive can exert a constant pull of 8.1 x 105 N, how long does it take to increase the speed of the train from rest to 84 km/h?
How much work is required to pull him 65 m up a 30° slope (assumed frictionless) at a constant speed of 2.7 m/s?
A 9.0 kg object undergoes an acceleration of 2.3 m/s2. (a) What is the magnitude of the resultant force acting on it?
The sledge moves a distance of 19.8 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. What is the tension of the rope? How much work is done by
What is the magnitude and direction of the force on that wire due to the earth's magnetic field?
A Fraunhofer diffraction pattern is produced on a screen 91 cm from a single slit. The distance from the center of the central maximum to the first-order maximum is 6300 times the wavelength .Calcul
A 6.25 kg particle with velocity = (3.96 m/s) - (8.87 m/s) is at x = 1.60 m, y = 5.36 m. It is pulled by a 7.65 N force in the negative x direction. About the origin, what are (a) the particle's ang
Two insulating spheres have radii 0.300 cm and 0.500 cm, masses 0.200 kg and 0.700 kg, and uniformly distributed charges of -2.00 µC and 4.50 µC. They are released from rest when their c
Two wires with the same resistance have the same diameter but different lengths. If wire 1 has length L1 and wire 2 has length L2, how do L1 and L2 compare if wire 1 is made from copper and wire 2 i
If the train is initially moving at a speed of 60 km/h, in how short a distance can the train be stopped at constant acceleration without causing the crates to slide over the floor.
At first glance, the fuel cell may seem to be an ideal power source for automotive use. Clearly the logistical problems outweigh the advantages at this time. List some of the problems.
Calculate the angular separation of the second order bright fringes between light of wavelength 600 nm and 612.4 nm. Answer in units of mrad.
A metal ball with a mass of 3.37 x 10-6 kg and a charge of +5.21 mC has a kinetic energy of 6.49 x 108 J. It is traveling directly at an infinite plane of charge with a charge distribution of +4.07 C
If the wire is 50.7 m long, and its diameter is 0.0259 cm, find the resistivity of the wire. Find the work done by this battery to push one electron through the entire length of the wire.
Suppose a 33.4 V battery is connected to a long cylindrical wire, and a current of 2.58 A flows. a) How many electrons will pass a given point in the wire every second?
What are the x- and y-components of the cannonball's velocity just before it lands? The y-axis points up.
Find the magnitude of the acceleration of the center of mass of the spherical shell. Take the free-fall acceleration to be = 9.80 .
The potential energy of a girder, after being lifted to the top of a building, is 5.17 x 10 to the fifth power ft. lb. If its mass is 173 slugs, how high is the girder?
Astronaut Alan Shepard took a golf ball to the moon. he hit what is thought to be the longest golf drive in history. what speed would an astronaut need to give a lunar golf ball in order to put the
Tidal effects in the Earth-Moon system are causing the Moon's orbital period to increase at a current rate of about 35 ms per century. assuming the moon's orbit around the earth is circular, to what
A centrifuge in a medical laboratory rotates at an angular speed of 3700 rev/min. When switched off, it rotates through 50.0 revolutions before coming to rest. Find the constant angular acceleration
Calculate what fraction of gamma rays passing this person must be absorbed for this safe distance to be true.
An unstable nucleus of mass 1.70 x 10-26 kg, initially at rest at the origin of a coordinate system, disintegrates into three particles. One particle, having a mass of m1 = 5.90 x 10-27 kg moves in
A 2500 kg car moving east at 10.0 m/s collides with a 3000 kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 37.0° north of east and at a speed
A stone is thrown upward at an angle of 63° above the horizontal. Its maximum height during the trajectory is 24 m. What was the stone's initial speed?