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A 24.0 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 88.5N and is directed at an angle of 30.0degress above the horizontal. Determi
What are approximate simple harmonic motion and exact simple harmonic motion and why exactly simple harmonic motion and exact simple harmonic motion and why exactly simple harmonic motions are rare?
A 1543-kg submarine rises straight up toward the surface. Seawater exerts both an upward buoyant force of 14,687 N on the submarine and a downward resistive force of 1007 N. What is the submarine's
A worker stands still on a roof sloped at an angle of 34.3° above the horizontal. He is prevented from slipping by a static frictional force of 415 N. Find the mass of the worker.
Three forces act on a moving object. One force has a magnitude of 86.0 N and is directed due north. Another has a magnitude of 61.0 N and is directed due west. What must be the magnitude and directi
Traveling at a speed of 17.9 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.800. What i
A 25.0-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 77.5 N and is directed at an angle of 30.0° above the horizontal. Determin
A Mercedes-Benz 300SL (m = 2000 kg) is parked on a road that rises 15° above the horizontal. (a) What is the magnitude of the normal force?
The book weighs 32 N. The coefficient of static friction between his hands and the book is 0.45. To keep the book from falling, what is the magnitude of the minimum pressing force that each hand mus
A 4.1 kg cart is placed on a frictionless air track with an angle of 64.3o. A 23.4 kg mass is attached to the cart using a massless string draped over the end of a frictionless pulley at the top of
A 50 kg force block at rest on a frictionless surface is acted on by forces F1 = 5.5 N and F2 = 3.5 N . What additional forces keep block at rest?
A double-slit experiment is performed and then redone using slits of double the previous separation. Nothing else is changed. If the approxmation sin Q = Q holds, what happens to the angle between t
Laser light of 589nm weavlengthis shown through parallel slits forming a series of maximum on a screen 4.20m away. If the distance between the central maximum and the first order maximum is 1.67 cm,
In a Young's double slit experiment, a 5th order maximum occurs at an angle of 1.422 degree. If the screen is 3.9m from the slit and the slit separation is 0.135mm, what weavlength being used?
An air-track glider attached to a spring oscillates with a period of 1.50 s. At t=0 s the glider is 5.50 cm left of the equilibrium position and moving to the right at 39.9 cm/s.
A 0.4-kg object is traveling to the right (in the positive direction) with a speed of 2 m/s. After a 0.2 s collision, the object is traveling to the left at 3 m/s. What is the magnitude of the impul
A man in a bosun chair dangles from a massless rope, which runs over a massless, frictionless pulley and back down to the man's hand. Combined mass of the man and chair is 95.0 kg.
A person is riding a bicycle, and its wheels have an angular velocity of +18.5 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement
A basketball player is balancing a spinning basketball on the tip of his finger. The angular velocity of the ball slows down from 20.0 to 13.9 rad/s, during the slow down the angular displacement is
An electric circular saw is designed to reach its final angular speed, starting from rest, in 1.40 s. Its average angular acceleration is 325 rad/s2. Obtain its final angular speed.
The radiation detector known as a Geiger counter uses a closed, hollow, cylindrical tube with an insulated wire along its axis. Suppose a Geiger tube, as it's called, has a 1.0mm-diameter wire in a
What is the minimum coating thickness that will minimize the reflection at the wavelength of 701 nm where solar cells are most efficient?
Hooke's law describes a certain light spring of unstretched length 31.0 cm. When one end is attached to the top of a door frame, and a 7.60-kg object is hung from the other end, the length of the sp
If the speed of the child at the lowest position is 1.60 m/s, what is the mechanical energy lost due to friction?