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A metal rod of length 2.0 m is moved at 6.0 m/s in a direction perpendicular to its length. A 5.0 m T magnetic field is perpendicular to both the rod and its velocity. If the resistance of the rod i
An 7.00 kg ball, hanging from the ceiling by a light wire 150 cm long, is struck in an elastic collision by a 2.00 kg ball moving horizontally at 3.00 m/s just before the collision. Find the tensio
A uniform magnetic field points vertically upward; its magnitude is 0.753 T. An electron with kinetic energy 7.1*10^-18 J is moving horizontally eastward in this field. What is the magnetic force ac
A cannonball is catapulted toward a castle. The cannonball's velocity when it leaves the catapult is 48 m/s at an angle of 40° with respect to the horizontal and the cannonball is 7.0 m above t
Find the magnetic flux through an individual turn of the coil if the magnetic field makes an angle of 45 degrees with the normal to the plane of the coil.
At what distance from a long, straight wire carrying a current of 4.1 A is the magnetic field due to the wire equal to the strength of Earth's field, approximately 5.2 × 10-5 T? The permeabilt
A 1.00m -diameter current loop with 250 turns of wire is set up so that the field at the center is exactly equal to the earth's field in magnitude but opposite in direction.
A ball is shot from the ground into the air. At a height of 9.1 m, the velocity is observed to be v = (7.6 + 6.7 ) m/s, with horizontal and upward. (a) To what maximum height does the ball rise?
Because among his equipment he has a 100 W light source that forms a directed beam, he considers using the beam as a photon rocket to propel himself continuously toward the spacecraft.
Calculate the ratio of your apparent weight at the top of the loop to your actual weight. In other words, how many times heavier do you feel? What is the maximum safe radius for the loop, such that
A person holds a ladder horizontally at its center. Treating the ladder as a uniform rod of length 3.90 m and mass 7.67 kg, find the torque the person must exert on the ladder to give it an angular
After falling from rest from a height of 35 m, a 0.51 kg ball rebounds upward, reaching a height of 25 m. If the contact between ball and ground lasted 2.4 ms, what average force was exerted on the
Find the first four harmonics for a string that is 1.0 m long, has a linear mass density of 5.0×10-2 kg/m and is under a tension of 80 N. Find the corresponding wavelengths.
A 1.90 {\rm m}-diameter current loop with 250 turns of wire is set up so that the field at the center is exactly equal to the earth's field in magnitude but opposite in direction.
A charged particle A exerts a force of 2.36 µN to the right on charged particle B when the particles are 12.9 mm apart. Particle B moves straight away from A to make the distance between them
The dome of a Van de Graaff generator receives a charge of 1 X 10^-4 C. Find the strength of the electric field in the following situations.
A flat surface having an area of 3.5 m2 is rotated in a uniform electric field of magnitude E = 5.9 x 105 N/C. Determine the electric flux through this area in the following situations: (a) when the e
An electric field of intensity 2.7 kN/C is applied along the x-axis. Calculate the electric flux through a rectangular plane 0.350 m wide and 0.700 m long if the following conditions are true:
A 5.9 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 3.4 m/s2, find the force exerted by the rope on the bucket.
Vector A has a magnitude of 12 units, vector B has a magnitude of 25 units, and A · B has a value of 14.0. What is the angle between the directions of A and B?
A shopper in a supermarket pushes a loaded cart with a horizontal force of 9 N. The cart has a mass of 32 kg. (a) How far will it move in 7.0 s, starting from rest? (Ignore friction.)
A block of weight w sits on a plane inclined at an angle theta. The coefficient of kinetic friction between the plane and the block is Mu. What is the change in the potential energy of the block, (c
A 4.7 g bullet leaves the muzzle of a rifle with a speed of 324 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.9 m long barrel of the rifle?
A boat moves through the water with two forces acting on it. One is a 1800 N forward push by the water on the propeller, and the other is an 1100 N resistive force due to the water around the bow.
A projectile is launched with a speed of 41 m/s at an angle of 55° above the horizontal. Use conservation of energy to find the maximum height reached by the projectile during its flight.