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A garden cart loaded with firewood is being pushed horizontally when it encounters a step h = 7.0 cm high, as shown in Fig. 12.20. The mass of the cart and its load is55 kg, andthe cart is balanced so that its center of mass is directly overthe axle. The wheel diameter is 60 cm. What is the minimum horizontal force that will get the cart up the step?
A stalactite on the roof of a cave drips water at a steady rate to a pool 3.8 below. What is the velocity of the second drop when the first drop hits the pool
The current in a coil drops from 3.1 A to 2.6 A in 0.53 s. If the average emf induced in the coil is 12 mV, what is the self-inductance of the coil
Two point charges are on the y axis. A 5.20-µC charge is located at y = 1.25 cm, and a -2-µC charge is located at y = ?1.80 cm. Find the total electric potential at the origin
the electric field 4.30cm from a very long charged wire is 1900nc toward the wire. what is the charge in nc on a
A 8.0x10^-2-kg ice cube at 0.0 C is dropped into a Styrofoam cup holding 0.35 kg of water at 11 C. Find the final temperature of the system. Find the amount of ice (if any) remaining. Find the initial temperature of the water that would be enough to ..
three guns are aimed at the center of a circle and each fires a bullet simultaneously. the directions in which they
A 380-N, uniform, 1.50 m bar is suspended horizontally by two vertical cables at each end. A small object of weight 520 N is placed distance 0.5 m from the cable A. What is the tension in cable A.
A white billiard ball with mass mw = 1.3 kg is moving directly to the right with a speed of v = 3.42 m/s and collides elastically with a black billiard ball with the same mass mb = 1.3 kg, What is the final speed of the white ball
Your friend has a near point of 112 cm, and she wears contact lenses that have a focal length of 34.6 cm. How close can she hold a magazine and still read it clearly
Four identical metallic objects carry the following charges: +8.2 µC, +7.0 µC, -2.6 µC, and -9.2 µC. What is the final charge on each object
A cheetah standing by a tree accelerated directly east at a constant rate for one-half minute. He then continued directly east at a constant speed for two minutes. During the next threefourths minute he slowed at a constant rate and came to a stop..
Two wheels have the same mass and radius of 4.5 kg and 0.39 m, respectively. One has (a) the shape of a hoop and the other (b) the shape of a solid disk. The wheels start from rest and have a constant angular acceleration with respect to a rotatio..
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