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The edge of the roof is 14m above the ground. A man 1.9 m tall is standing 4m from the edge of the barn. Will he be hit by the snowball?
Downrange from the launch point throws an apple straight up with the minimum initial speed necessary to meet the path of the arrow. What is the initial speed of the apple?
The solenoid has 40 turns per centimeter and carries a counterclockwise current of 15.0 A. Find the force on each side of the loop and the torque acting on the loop.
A 1,000kg car going around the curve is 8,000N. What speed limit should be posted for the curve so that cars can negotiate is safely?
A dockworker loading crates on a ship finds that a 19 kg crate, initially at rest on a horizontal surface, requires a 83 N horizontal force to set it in motion. However, after the crate is in motion
A small remote-control car with a mass of 1.70 moves at a constant speed of = 12.0 in a vertical circle inside a hollow metal cylinder that has a radius of 5.00 .What is the magnitude of the normal
A 40kg block rest on an horizontal plane. A minimum force of 145 N can set it on motion while a minimum force of 100 N will keep it travelling with a constant velocity. Calculate the coefficient of
A baseball player runs 27.4 meters from the batter's box to first base,overruns first base by 3.0 meters,and then returns to first base. Compared to the total distance traveled by the player,the ma
If the player hears the sound of the splash 2.99 s later, what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s.
An ideal spring with a stiffness of 379 N/m is attached to a wall, and its other end is attached to a block that has a mass of 16.0 kg. The spring/block system is then stretched away from the sprin
Electrons in a photoelectric-effect experiment emerge from a copper surface with a maximum kinetic energy of 1.10 . What is the wavelength of the light?
The traces of the rain on the side windows of the car make an angle of 75.0° with the vertical. Find the velocity of the rain with respect to the following reference frames.
A 270 ball and a 520 ball are connected by a 50.0-cm-long massless, rigid rod. The structure rotates about its center of mass at 120 rpm. What is its rotational kinetic energy?
You arrive home after driving 2 hours and 40 minutes. How far is your hometown from school? What was your average speed?
An airplane needs to reach a velocity of 226 km/h to take off. On a 2000 m runway, what is the minimum acceleration necessary for the plane to take flight?
Three beetles stand on a grid. Two beetles have the same weight, W, and the third beetle weighs 2W. (a) The lighter beetles are located at (1.00, 0) and (0, 2.00), and the heavier beetle is at (3.0
Jupiter's moon Io orbits Jupiter every 42.5 hours at an average distance of 422,000 kilometers from the center of Jupiter. Calculate the mass of Jupiter.
In the oncoming lane, he sees a car approaching, probably also traveling at 25 m/s. He estimates that the car is about 360 m away. should he attempt to pass.
A hanging wire made of an alloy of lead with diameter 0.05 cm is initially 2.6 m long. When a 4 kg mass is hung from it, the wire stretches an amount 3.24 cm. A mole of lead has a mass of 207 grams
An oxygen supply system mixes oxygen at 119 K and room air at 290 K at equal mass flow rates. What is the temperature of the resulting mixture in K? (c of oxygen = 918 J/kgK, c of air = 1012 J/kgK)
A car with a mass of 950-kg and an initial speed of v1 = 21.9 m/s approaches an intersection, as shown in the figure. A 1300-kg minivan traveling northward is heading for the same intersection. The
A rock of mass 40 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 234 N. What is the magnitude
the radius of earth is about 6.38x10^3 km. A 7.2 z 10^3 newton spacecraft travels away from earth. What is the weight of the spacecraft at different distances from the surface.
A 8.00 kg object oscillates at the end of a vertical spring that has a spring constant of 2.05 104 N/m. The effect of air resistance is represented by the damping coefficient b = 3.00 N·s/m.
Boat A negotiates a curve whose radius is 364 m. Boat B negotiates a curve whose radius is 140 m. Each boat experiences the same centripetal acceleration. What is the ratio of the speed of boat A t