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(a) How much work is done on the toboggan by the tension force? (b) How much work is done if the same tension is directed parallel to the snow?
The primary coil of an ideal transformer has 700 turns, and the secondary coil has 190 turns. The output current of the secondary coil?
The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.860, and the log has an acceleration of 0.900 m/s2. Find the t
What angle(s) between the normal to the plane of the loop and the field would result in a flux with a magnitude of 1.1×10-2 ?
A person pulls a toboggan for a distance of 30.0 m along the snow with a rope directed 20.0° above the snow. The tension in the rope is 67.0 N. (a) How much work is done on the toboggan by the t
The weight of the helicopter is W = 56800 N. The lift force generated by the rotating blade makes an angle of 21.0° with respect to the vertical. (a) What is the magnitude of the lift force?
Suppose that - had a magnitude of 3.74 km. What then would be the magnitude of and what is the direction of - relative to due south?
How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 85 m at a speed of 95km/h? (95km/h = 26.3m/s)
A small metal bead, labeled A has a charge of 25 nC. It is touched to metal bead B, initially neutral, so that the two beads share the 25 nC charge, but not necessarily equally. When the two beads a
At the top of its trajectory, the projectile explodes into two fragments of masses 0.97 kg and 2 kg. At 3.87 s after the explosion, the 2-kg fragment lands on the ground directly below the point of
Long-distance telephone communication utilizes transmission of electromagnetic signals in the microwave part of the spectrum. How long does it take to transmit a signal cross country, a distance of
A jogger travels a route that has two parts. The first is a displacement of 2.80 km due south, and the second involves a displacement that points due east. a(a) The resultant displacement + has a ma
The coefficient of kinetic friction between the log and the ramp is 0.850, and the log has an acceleration of 0.700 m/s2. Find the tension in the rope.
Write an expression (in terms of ihat and jhat) for the position of A relative to B as a function of t, where t = 0 when the ships are in the positions described as above.
A skier slides horizontally along the snow for a distance of 10 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is µk = 0.030. Initially, how fast w
A 6.00 x 102 kg hot-air balloon takes off from rest at the surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.70 x 104 J of work on the balloon in the proc
After flying for 15 min in a wind blowing 42 km/h at an angle of 28° south of east, an airplane pilot is over a town that is 56 km due north of the starting point. What is the speed of the airpl
To obtain maximum magnification and an image that can be seen clearly by a normal eye, where should the object be placed?
What is the flux of energy arising from a temperature gradient of 2.5 Km-1 in a sample of argon in which the mean temperature is 273K.
A rugby player runs with the ball directly toward his opponent's goal, along the positive direction of an x axis. He can legally pass the ball to a teammate as long as the ball's velocity relative t
A 250 kg flatcar 30 m long is moving with a speed of 3.0 m/s along horizontal frictionless rails. A 61 kg worker starts walking from one end of the car to the other in the direction of motion, with
At that point its engines fail, and the rocket goes into free fall, with an acceleration of -9.80 m/s2. (You will need to consider the motion while the engine is operating and the free-fall motion sep
Suddenly, the cheetah stops, turns, and then runs at 45 km/h eastward, as measured by a suddenly nervous crew member who stands alongside the cheetah's path. The change in the animal's velocity tak
A neon atom (m = 20.0 u) makes a perfectly elastic collision with another atom at rest. After the impact, the neon atom travels away at a 56.0° angle from its original direction and the unknown
A 1000 kg safe is held 2 m above a heavy duty spring when the rope holding it breaks. The safe compresses the spring 50 cm. What is the spring constant?