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A cart for hauling ore out of a gold mine has a mass of 447 kg, including its load. The cart runs along a straight stretch of track that is sloped 4.93° from the horizontal. A donkey, trudging along and to the side of the track, has the unenviable job of pulling the cart up the slope with a 539-N force for a distance of 151 m by means of a rope that is parallel to the ground and makes an angle of 13.5° with the track. The coefficient of friction for the cart\'s wheels on the track is 0.0145. Take g = 9.81 m/s2. Find the work that the donkey performs on the cart during this process.
Find the work that the force of gravity performs on the cart during the process.
Calculate the work done on the cart during the process by friction.
Suppose a particle with mass m is released from rest in a uniform gravity g, write down the relativistic equation of motion and find an expression that gives the relationship between velocity and time
How many electrons would have to be placed on the sphere to produce an electric field of magnitude 1.41 105 N/C at a point 8.60 cm from the center of the sphere
A container holds 2.9 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 8.1x10-3 kg bullet with a speed of 750 m/s
An electron, starting from rest, accelerates through a potential difference of 413 V. What is the final de Broglie wavelength of the electron, assuming that its final speed is much less than the speed of light
A man of mass 91 kg drops to a concrete patio from a window 0.63 m above the patio. What is the magnitude of the average stopping force exerted on him by the patio
A 2070 kg railroad flatcar, which can move with negligible friction, is motionless next to a platform. What is the speed of the flatcar if he then stands on it
A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 6 excited state. What are the photon wavelengths of transitions
A battery having an emf of 9.80 V delivers 109 mA when connected to a 60.0 load. Determine the internal resistance of the battery
A bullet is shot vertically up with v0 from ground level. The definition of vertical is by a plumb bob, find the location where the bullet returns to the ground
Calculate the magnitude of the gravitational force exerted on a 462-kg satellite that is a distance of 2.08 earth radii from the center of the earth. What is the magnitude of the earth's acceleration
A 9.59-g bullet, moving horizontally with an initial speed v0, embeds itself in a 1.45-kg pendulum bob that is initially at rest. Find the initial speed of the bullet.
A thin rod consists of two parts joined together. One third of it is silver and two-thirds is gold. The temperature decreases by 24C°.
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