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A 3000 kg truck traveling north at 38 km/h turns east and accelerates to 54 km/h. (a) What is the change in the truck's kinetic energy?
A car is driven east for a distance of 41 km, then north for 21 km, and then in a direction 34° east of north for 25 km. Determine (a) the magnitude (in km) of the car's total displacement from
Assuming that all the energy dissipated by kinetic friction goes into melting a small mass, m, of the ice, and the rest of the ice block remains at -1.5 degrees C, determine the value of m.
How far below the release point is the center of mass of the two stones at t = 800 ms? (Neither stone has yet reached the ground.)
What angle does the resulting w make with the vertical? (If you want, you can check your answer by showing that the theta that make this angle maximum is sin^-1 (sqrt(7/9) = 61.9 degrees)
A bicycle has wheels with a diameter of 0.590 m. It accelerates uniformly and the rate of rotation of its wheels increases from 189 rpm to 270 rpm in a time of 21.1 s. Find the linear acceleration o
A circular coil of wire 8.20 cm in diameter has 15.0 turns and carries a current of 3.20 A . The coil is in a region where the magnetic field is 0.650 T. a) What orientation of the coil gives the ma
After completing a 90° right-hand turn to the positive x direction in 4.4 s, the inattentive operator drives into a tree, which stops the car in 340 ms. (a) In unit-vector notation, what is the
A 2 kg metal plate slides down a 20-meter high slope. At the bottom its speed is 11.8 m/s. To the nearest Joule, what was the magnitude of the work done by friction?
You plan to tighten the plugs by pulling on the end of a 30-cm-long wrench. Because of the cramped space under the hood, you'll need to pull at an angle of 105 degrees with respect to the wrench sha
The turntable is at rest initially, but when the person begins running at a speed of 3.3 m/s (with respect to the turntable) around its edge, the turntable begins to rotate in the opposite direction
The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.25 rad/s2. It accelerates for 28.7 s, then maintains a constant angular velocity. Calculate the to
The solenoid has 500 turns and is 0.3 m long. The current in the solenoid is increasing at a constant rate of 0.7 A/s. What is the current flowing in the square loop?
A solenoid of length 4.6 cm and diameter 0.75 cm is wound with 180 turns per cm. The current is decreasing at a rate of 35.0 A/s. (a) What is the induced emf in one of the windings?
If the ball leaves his club with a velocity of 43m/s at an angle of 40.0 degrees to the ground, find the time for the ball to come down on the green, and the speed of the ball just before impact. Al
If all rays striking the interior walls of the pipe with incident angles greater than 60 degree are subject to total internal reflection, what is the index of refraction of the coating?
The beam strikes the wall over an area of 2.2 cm2, at the rate of 1024 molecules per second. What is the beam's pressure on the wall?
A skateboarder is moving at 5.66 m/s along a horizontal section of a track that is slanted upward by 48.0 ° above the horizontal at its end, which is 0.500 m above the ground.
A nichrome toaster wire, initially at room temperature, carries 2.71 A immediately after it's turned on. After the wire heats, the current drops to 2.44 A. What's the temperature of the nichrome the
Within what period of time must the field be reduced to zero if the average magnitude of the induced emf within the coil during the time interval is to be 13.4 kV? Answer in units of s.
Find the force on the particle as a function of x. (Use the following as necessary: k, q, m, a, Q, and x.)
A horizontal force of 155 N pushes a 6 kg block up a frictionless incline that makes an angle of 31° with the horizontal. (a) What is the normal force that the incline exerts on the block?
A man on the 15th floor of a building sees a bucket (dropped by a window washer) pass his window and notes that it hits the ground 2.3 s later. Assuming a floor is 11 ft high (and neglecting air fri
What is the magnitude of the minimum normal force that the brake shoe exerts on the shaft?
A small circular coil of wire is placed inside the solenoid with the normal to the coil oriented at an angle of 90.0° with respect to the axis of the solenoid. The coil consists of 54 turns, has