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Q. A 25 kg solid door is 220 cm tall, 94 cm wide. What is the door's moment of inertia for rotation about a vertical axis inside the door, 13 cm from one edge?
Q. A bullet of mass 4.3 g is fired horizontally into a 8.6 kg wooden block at rest on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.13. The bullet stops in the block, which slides straight ahead for 2.4 m (without rotation). (a) What is the speed of the block immediately after the bullet stops relative to it? (b) At what speed is the bullet fired?
The diodes are oppositely oriented, so that when one diode is forward-biased, the other is back-biased. Which phrase best describes the current in the circuit.
A toy car runs off the edge of the table that is 1.6405 m high. The car lands 0.3311 m from the base of the table how long does it take for the car to fall? The acceleration by reason of gravity is 9.80 m/s2.
A bar AB of negligible mass and length 2 m balanced at its midpoint a 4 kg and 5 kg masses are suspended from both ends. A 4 kg mass is 0.4m away from the midpoint. At what point the mass of 5 kg is suspended to a bar keep the balance.
A 115 granite cube slides down a 35 frictionless ramp. At the bottom, just as it exits onto a horizontal table, it collides with a 235 steel cube at rest.
At 500°C, the diffusion coefficient of Zn in brass is 4.10-17 m2.s-1. What is the flux of Zn moving down the rod.
While John is travelling along an interstate highway, he notices a 139 mi marker as he passes through town. Later John passes a 116 mi marker. What is the distance between town and John's current location.
The stirrer is used to stir the mixture until it reaches its last equilibrium temperature of 32°C. Analyse the mass of the aluminum cup.
A 0.12-kg ball is placed in a shallow wedge with an opening angle of 120°, as shown in the figure. For each contact point between the wedge and the ball, determine the force exerted on the ball. Assume the system is frictionless. Find contact force o..
A wooden raft has a mass of 65 kg. When empty it floats in water (density 1000 kg/m3) with 41percent of its volume submerged. What mass of sand can be put on the raft without it sinking.
Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
A rocket blasts off vertically from rest on the launch pad with an upward acceleration of 2.30. At 10.0 after blastoff, the engines suddenly fail, which means that force they produce instantly stops.
A bicyclist of mass 75 kg ( including the bicycle) can coast down a 4.0 degree hill at a constant speed of 10 km/h. Pumping hard,the cyclist can descend the hill at a speed of 30 km/h.
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