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The driver of a 1800 car traveling on a horizontal road at 120 suddenly applies the brakes. Due to a slippery pavement, the friction of the road on the tires of the car, which is what slows down th
The environment in a satellite or space station orbiting the Earth is often referred to as weightless environment; however, we have de?ned weight as the force of gravity on an object. In this sense
A child slides down a slide with a 34 degree incline, and at the bottom her speed is precisely half what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic
For the cyclist in this 30.0 s interval, what are the (a) magnitude and (b) direction of the displacement, the (c) magnitude and (d) direction of the average velocity.
Select the quanity that has changed velocity or speed for a car that travels north at 88 km/h and then turns east while continuing to move att 88 km/h explain your anwser.
A 26.0g ball is fired horizontally with initial speed v_0 toward a 100g ball that is hanging motionless from a 1.10m -long string. The balls undergo a head-on, perfectly elastic collision, after whi
A wooden rod of negligible mass and length 83.0 is pivoted about a horizontal axis through its center. A white rat with mass 0.490 clings to one end of the stick, and a mouse with mass 0.250 clings
A 2.00g bullet strikes a 2.00kg block hanging from a long cord. Find the velocity of the bullet before it collides with the block.
A freight train has a mass of 1.6 × 107 kg. If the locomotive can exert a constant pull of 6.6 × 105 N, how long does it take to increase the speed of the train from rest to 86 km/h?
Three equal point charges, each with a charge of 1.60 mu C, are placed at the corners of an equilateral triangle whose sides have a length of 0.450 m. What is the potential energy of the system? (T
The initial velocity of the clay is 15.5 m/s, directed perpendicular to the vane. Find the angular velocity of the weather vane just after it is struck.
A potter's wheel having a radius 0.50 m and a moment of inertia of 14 kg · m2 is rotating freely at 48 rev/min. The potter can stop the wheel in 4.0 s by pressing a wet rag against the rim a
An airplane flies 192 km due west from city A to city B and then 298 km in the direction of 30° north of west from city B to city C. (a) In straight-line distance, how far is city C from city A
Perpendicular to the direction of the electron's motion. This magnetic field accelerates the electron in a circular motion. What is the radius of the circle?
A 160-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 40° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it st
The Jeep encounters an unbanked curve of radius 50 m. The Jeep follows the road from B to h. What is the magnitude of the acceleration of the Jeep as it travels from A to B?
A soccer ball with a mass of 442 g bounces off the crossbar of a goal and is deflected upward at an angle of 58.0° with respect to horizontal. Immediately after the deflection, the kinetic energy
What are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and the ice.
A horizontal uniform bar of mass 2.6 and length 3.0 is hung horizontally on two vertical strings. String 1 is attached to the end of the bar, and string 2 is attached a distance 0.7 from the other
A 170 , 50.0-cm-diameter turntable rotates on frictionless bearings at 55.0 . A 24.0 block sits at the center of the turntable. A compressed spring shoots the block radically outward along a fricti
A bullet is fired horizontally with an initial velocity of 600 m/s at a target located 150 m from the rifle. Using the approximate value of g = 10 m/s2, how far does the bullet fall in this time?
A ball of mass 10 kg and a ball of mass 1000 kg are ?oating in empty space, connected by a spring of negligible mass and force constant k = 10000 N/m. At a certain instant, the spring has been stre
A cube of ice is taken from the freezer at -8.3°C and placed in a 100 g aluminum calorimeter filled with 289 g of water at room temperature of 20°C. The final situation is observed to be al
It travels 306.5 cm in thehorizontal direction before it hits the ground. Calculate themomentum of the steel ball in the horizontal direction.
In order to clearly read a book 16 cm away, a farsighted girl needs an image to be 38 cm from her eyes. What focal length is needed for the lens in her eyeglasses?