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A 1.00 × 104 kilogram railroad car is rolling at 2 m/s when a 3000 kilogram load of gravel is suddenly dropped in. Determine the car speed just after the gravel is loaded?
A wrench is thrown at a speed of 69 mph at a wall that is 70 ft away. How much force does the wall exert on the wrench and in what direction
A horizontal wire of 0.52 m carrying a current of 8.2 A is placed in a uniform external magnetic field. Determine the magnitude of the external magnetic field
Light of wavelength 700 nm falls on a 0.38 mm wide slit and forms a diffraction pattern on a screen 1.3 m away. Find the width of the central maximum
A person with a mass of 50 kg jumps vertically with an initial velocity of 2 m/s assuming there is no vertical forces other than a (subscript g) acting on a person
A boy pushes horizontally with a force of 210 Newton on a 40 kilogram crate to move it across a level ground. The coefficient of kinetic friction is 0.25. Evaluate what is the magnitude of the crate acceleration
A 15.5 kilogram dog is running northward at 2.98m/s, while a 4.83 kilogram cat is running eastward at 2.54m/s. Obtain the direction and magnitude of the owner velocity
1 a 2.26 kg book is dropped from a height of 1.5 m. what is the books accelartion ?2 the parachute on a race car that
A battery of ε = 2.00 V and internal resistanceR = 0.450 Ω is driving a motor. The motor is lifting a 2.0N mass at constant speed v = 0.50 m/s. Assumingno energy losses, find the current i in the circuit. Enter the lower current.
A person of mass 75 kg stands at the center of a rotating merry-go-round platform of radius 3 m, Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk
Light of wavelength 633 nm from a helium-neon laser is shone normally on a plane containing two slits. The first interference maximum is 79 cm from the central maximum on a screen 13 m away. (a) Find the separation of the slits. (b) How many interfer..
A uniform magnetic field B is set up in a solenoid of radius a =.4m. B is directed out of the plane of the paper, and is increasing ar a constant rate of +.5 T/s. find the size of the current induced in the metal ring
A rocket, which is in deep space and initially at rest relative to an inertial reference frame, has a mass of 59.6 × 105 kg, of which 7.27 × 105 kg is fuel. What is the rocket's thrust
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