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The current in a solenoid with 22 turns per centimeter is 0.50 . The solenoid has a radius of 1.6 . A long, straight wire runs along the axis of the solenoid, carrying a current of 15. Find the magn
Two blocks of masses m1=1kg and m2=2kg are connected by a massless cord passing over a massless, frictionless pulley. The pulley is pulled up with a force F=50 N. What is the accelerations of the tw
A hotel elevator ascends 170 m with a maximum speed of 5.0 m/s. Its acceleration and deceleration both have a magnitude of 1.0 m/s2. (a) How far does the elevator move while accelerating to full spe
A 65 kg boy and girl use an elastic rope while engaged in a tug of war on an icy, frictionless surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the accelera
A particle with charge travels in a circular orbit with radius 4.68 due to the force exerted on it by a magnetic field with magnitude 1.65 and perpendicular to the orbit. What is the magnitude of th
The coefficient of kinetic friction is 0.25. Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work done by
A plane has an airspeed of 300 . The pilot wishes to reach a destination 600 due east, but a wind is blowing at 90.0 in the direction 60.0 north of east. In what direction must the pilot head the pl
However, after the crate is in motion, a horizontal force of 57 N is required to keep it moving with a constant speed. Find the coefficients of static and kinetic friction between crate and floor.
If the parachutist comes to rest with constant acceleration over a distance of 0.710 m, what force does the ground exerts on her?
A flat (unbanked) curve on a highway has a radius of 220 m. A car rounds the curve at a speed of 38.0 m/s. (a) What is the minimum coefficient of friction that will prevent sliding?
An 670kg car goes from a speed of 24 m/s in 6.0s. What average force is exerted by the brakes over this interval? Take the forward direction as postive.
An airplane is heading due south at a speed of 560 km/h. If a wind begins blowing from the southwest at a speed of 70 km/h (average), calculate the following. (a) the velocity (magnitude and directi
She weighs 555 N. As the drawing shows, she is closer to the left cliff than to the right cliff, with the result that the tensions in the left and right sides of the rope are not the same. Find the
A soccer player kicks a rock horizontally off a 38.0 m high cliff into a pool of water. If the player hears the sound of the splash 3.3 s later, what was the initial speed given to the rock? Assume
A curve of radius 50.9 m is banked so that a car traveling with uniform speed 64 km/hr can round the curve without relying on friction to keep it from slipping to its left or right. The acceleration
A sledge weighs 1400 lb. it is oulled on level snow by a dog team exerting a horizontal force on it. The coefficent of kinetic friction between sledge and snow is 0.05. how much work is done by the
A hotel elevator ascends 160 m with a maximum speed of 5.6 m/s. Its acceleration and deceleration both have a magnitude of 1.0 m/s2. (a) How far does the elevator move while accelerating to full spe
Tarzan plans to cross a gorge by swinging in an arc from a hanging vine, as shown in the figure. If his arms are capable of exerting a force of 1700 N on the vine, what is the maximum speed he can t
A hiker leaves base camp and hikes the following routes over a two day period. The first day she travels at a 45 degree north of west for 20 km, she then sets up camp for the night. On day two she t
A 100 kg block attached to an ideal pulley with a block of unknown mass on the other end takes 8.5 secs to reach the floor after being released from rest. It falls 1m. What is the mass ofthe unknown
A loudspeaker of mass 21.0 is suspended a distance of = 1.40 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 3.9
Two cars are initially 279km apart and traveling toward each other on a straight stretch of freeway. One car is moving a 38 m/s and the other is moving at 75 m/s. In how many seconds will they pass
Cathode-ray tubes (CRTs) are often found in oscilloscopes and computer monitors. In the figure an electron with an initial speed of 6.60×10^6 is projected along the axis midway between the def
A rocket is fired at a speed of 75.0 m s from ground level at an angle of 60 degrees above the horizontal, the rocket is fired toward an 11 m high wall located 27 m away by how much does the rocket
In this same time, what is the vertical displacement of the electron? Treat up as positive.