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Find both the potential energy of the system when the car is at points a and b and the change in potential energy as the car moves from point a to point b , assuming y = 0 at point b.
A proton is released from rest in a uniform field of magnitude +1.41e5 N/C. Find the speed of the proton after it has traveled 4cm and 40 cm.
A stone of mass 0.3kg is tied to a string of length 0.75m and is swung in a horizontal circle with speed v. The string has a breaking-point tension of 50N. What is the largest value v can have witho
A rod supports a 2.35-kg lamp. a) What is the magnitude of the tension in the rod? b) Calculate the components of the force that the bracket exerts on the rod.
The resultant displacement has a magnitude of 170 cm and is directed at an angle of 65.0° to the positive x axis. Find the magnitude and direction of the second displacement.
From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building
A street lamp weighs 170 N. It is supported by two wires that form an angle of 150° with each other. The tensions in the wires are equal. What is the tension in each wire supporting the street l
A race car has a mass of 706 kg. It starts from rest and travels 39.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?
A sledge loaded with bricks has a total mass of 18 kg and is pulled at constant speed by a rope inclined at 20 degrees above a horizontal surface. The coefficient of kinetic friction between the sl
A Carnot engine has an efficiency of 35%. If 325 J of heat are released into the environment every cycle, what must be the amount of heat absorbed by the high temperature reservoir
The ladder of length, l=15m and mass of 35kg rests against a smooth frictionless wall. The coefficient of friction between the ladder and ground is 0.6 and the ladder makes an angle, theta with the
A place kicker must kick a football from a point 36.0 m (about 39.0 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a spee
A house is 100.0 ft long and 46 ft wide, and has 8.0 ft high ceilings. What is the volume of the interior of the house in cubic meters and cubic centimeters?
Find the magnitude of the acceleration for an electron in a uniform electric field with a magnitude of 122 N/C.
If the elastic limit of steel is 5.0 multiplied by 108 Pa, determine the minimum diameter a steel wire can have if it is to support a 70 kg circus performer without its elastic limit being exceeded.
When the door is open and at rest, the door closer exerts a torque of 5.4 {rm N}cdot {rm m}. A: What is the moment of inertia of the door?
A 33 kg crate rests on a horizontal floor, and a 73 kg person is standing on the crate. Determine the magnitude of the normal force that the floor exerts on the crate. Also determine the magnitude
What is the tangential acceleration of a bug on the rim of a 11 in diameter disk if the disk accelerates uniformly from rest to an angular speed of 83 revolutions per minute in 2.7 s?
A box of books weighing 350 N moves with a constant velocity across the floor when it is pushed with a force of 439 N exerted downward at an angle of 30.7 degrees below the horizontal. Find mu k be
A 5.00 m times 12.0 m swimming pool slopes linearly from a 1.20 m depth at one end to a 3.40 m depth at the other. What is the mass of water in the pool?
A 10 g bullet is fired into a 9.0 kg wood block that is at rest on a wood table. The block, with the bullet embedded, slides 5.0 {rm cm} across the table. The coefficient of kinetic friction for woo
In a uniform electric field of magnitude E, the field lines cross through a rectangle of area A at an angle of 45.0° with respect to the plane of the rectangle. What is the magnitude of the flu
When the magnetic field is 0.5 T, find the magnitude of the current through middle leg PQ of the circuit.
What is the angular velocity of the merry-go-round now?
A wheel rotates with a constant angular acceleration of 4.35 rad/s2. Suppose that the initial angular speed of the wheel is 2.99 rad/s. Through what angle does the wheel rotate after 2.88 s?