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A swimmer heads directly across a river, swimming at 1.60 m/s relative to the water. She arrives at a point 58.0 m downstream from the point directly across the river, 63.0 m wide. What is the spee
A Ferris wheel with a radius of 8.00 m rotates at a constant rate, completing one revolution in 30.0 s. What is the apparent weight of a 60.0-kg passenger when she is at the top of the wheel?
Determine the vertical and horizontal components of the pendulum's displacement. I don't even know how to set this problem up.
A jetliner is moving at a speed of 355 m/s. The vertical component of the plane's velocity is 41.2 m/s. Determine the magnitude of the horizontal component of the plane's velocity.
A car travelling at 22 m/s comes to an abrupt halt in 0.1 seconds when it hits a tree. What is the deceleration (negative acceleration) of the vehicle?
A chair of mass 11.0 kg is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force F = 41.0 N that is directed at an angle of 41.0^circ below the horizont
When released, it lifts a length h of string and then remains in equilibrium. Determine the value of h. The envelope of the balloon has mass 0.290 kg.
On a highway curve with radius 80m, the maximum force of static friction (centripetal force) that can act on a 1,000kg car going around the curve is 8,000N. What speed limit should be posted for the
In the "before" part of the figure below, car A (mass 1200 kg) is stopped at a traffic light when it is rear-ended by car B (mass 1500 kg). Both cars then slide with locked wheels until the friction
A 10.0 g of Styrofoam carries a net charge of -0.700 uC and floats above the center of a large horizontal sheet of plastic that has a uniform charge density on its surface. What is the charge per u
A 0.139 kg mass is attached to a spring and executes simple harmonic motion with a period of 0.64 s. The total energy of the system is 4 J. Find the force constant of the spring.
A rifle is aimed horizontally at a target 47 m away. The bullet hits a target 2.00 cm below the aim point. What is the bullets flight time? What is the bullets speed as it left the barrel?
Determine the ray-transfer matrix for an optical system made of a thin convex lens of focal length f and a thin concave lens of focal length -f separated by a distance f. Discuss the imaging proper
A proton initially moves left to right long the x-axis at a speed of 2 E 3 m/s. What acceleration magnitude does the proton experience?
A convex mirror has a focal length of -11 cm. A lightbulb with a diameter of 6.0 cm is placed 60.0 cm in front of the mirror. Locate the image of the lightbulb.
A 55.0 g Super Ball traveling at 29.0 m/s bounces off a brick wall and rebounds at 16.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 4.50 ms, what is the
A 80 kg water skier floating in a lake is pulled from rest to a speed of 12 m/s in a distance of 25 m. What is the net force exerted on the skier, assuming his acceleration is constant?
There is a 0.275 T magnetic field directed along the +x axis and a field of unknown magnitude along the +y axis. A particle carrying a charge of 7.10 10-5 C experiences a maximum force of 0.455 N w
An osprey calls while diving at you, to drive you away from her nest. You hear the call at 2220 Hz. How fast is the osprey approaching?
At a certain location, the horizontal component of the earth's magnetic field is 2.2 10-5 T, due north. A proton moves eastward with just the right speed, so the magnetic force on it balances its we
In a hydroelectric installation, a turbine delivers 1900 hp to a generator. Under these conditions, what current will the generator deliver at a terminal potential difference of 1030 V?
While rearranging a dorm room, a student does 304 J of work in moving a desk 3.1 m. What was the magnitude of the applied horizontal force?
A 17 g rifle bullet traveling 235 m/s buries itself in a 3.7 kg pendulum hanging on a 3.0 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal compon
What is the mass of the string, observed wave speed is 16m/s when the suspended mass is 3.0kg
The sun shines on a thin so that a 440 nm blue light is seen reflecting off the film. What is the minimum thickness of the film?