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A 3.10-m-long, 300 steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 73.0 construction worker stands at the far end of
When the first team uses its GPS to check the position of the second team, what does it give for the second team's (a) distance from them and (b) direction, measured from due east?
A 6 g object going 90.0 cm/s at time zero has a constant acceleration of -25 cm/s 2. How far did the object travel in the six seconds.
A 2000-kg car is traveling at 20 m/s around a curve with a radius of 100 m. What is the angular momentum of the car? (in kg•m2/s)
What does the scale read when the elevator descends at a constant speed of 2.0 m/s?
The coefficients of static and kinetic frictions for plastic on wood are 0.50 and 0.40, respectively. How much horizontal force would you need to apply to a 3.0 N plastic calculator to start it movi
While in the volume it produces a bremstrahlung x-ray of 1,15MeV which escapes from V. What is the contribution of this event to: The energy transferred?
A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes. The friction force on the sled is 1200 N and the angle between the two
Assume the water at the top of the tank moves so slowly downward that v=0 at that point and that the atmospheric pressure is the same at the top of the water and at the hole. What is the rate of flo
A firefighter of mass 52 kg slides down a vertical pole with an acceleration of 6 m/s^2. The acceleration of gravity is 10 m/s^2. What is the friction force that acts on him? Answer in units of N
Then accelerates out, reaching her previous speed of 65.0 m/s after a distance of 350 m. At this point how far has the Thunderbird fallen behind the Mercedes Benz, which has continued at a constant
The distance between the centres of the Earth and the Moon is 384.4 times 10 to the power of 6 metres. Find the mass of the Moon (Mm) in terms of the mass of the Earth (Me).
the object's acceleration has a magnitude of 0.859 m/s2. However, when FA points due east and FB points due west, the acceleration is 0.500 m/s2, due east. Find (a) the magnitude of FA and (b) the m
A 250 , 35-cm-diameter turntable rotates on frictionless bearings at 60 . A 25 block sits at the center of the turntable. A compressed spring shoots the block radically outward along a frictionless
A friend of yours is loudly singing a single note at 410 Hz while racing toward you at 26.1 m/s on a day when the speed of sound is 339 m/s. What frequency does your friend hear if you suddenly star
Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists at the center of the square.
A toy train rolls around a horizontal 1.7--diameter track. The coefficient of rolling friction is 0.10. What is the magnitude of the train's angular acceleration after it is released? (found) How lo
A boxcar of mass 600 tons at rest becomes uncoupled on a 5.00 grade. If the track is considered to be frictionless, what speed does the boxcar have after 15 seconds?
A 12.0 g bullet is fired horizontally into a 101 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring of constant 151 N/m. The bullet becomes embe
3.50×1023 nitrogen molecules collide with a 15.0 wall each second. Assume that the molecules all travel with a speed of 410 and strike the wall head on. What is the pressure on the wall?
A third force is applied and balances to zero the effects of the other two. What are the nagnitudes and direction of this third force? Specify the direction relative to the negative x axis.
How far does the cab move while accelerating to full speed from rest? How long does it take to make the nonstop 198 m run, starting and ending at rest?
An echo is heard in 3 sec after the emission of sound. If speed of sound in air is 342 m/s, what is the distance of the reflecting surface from the source?
A constant torque of 25.0 N·m is applied to a grindstone whose moment of inertia is 0.130 kg·m2. Using energy principles, and neglecting friction, find the angular speed after the gri
A 1 m rod of pure copper 1 cm2 in cross section connects a 200 oC thermal reservoir with a 0 oC thermal reservoir. The system has already reached steady state. What is the rate of change entropy of