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A 85.0 kg fullback is running at 3.86 m/s to the east and is stopped in 0.800 s by a head-on tackle by a tackler running due west. Calculate the impulse exerted on the tackler
A 8500 kg boxcar traveling at 16.8 m/s strikes a second boxcar at rest. What is the mass of the second car
A string is stretched between fixed supports separated by 73.0 cm. It is observed to have resonant frequencies of 390, What is the wave speed for this string
two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 448 N and F2 = 350 N. What is the resultant of these two forces
A wire of unknown material has a cross-sectional area 7 mm2 and length 15 cm. What is the resistivity of the unknown material
You are rotating a 2.0kg rock in a vertical circle,using a very light string. Find the speeds of the rock at the highest and lowest position
A small omnidirectional stereo speaker produces waves in all directions that have an intensity of 8.50W/m2 at a distance of 4.00m from the speaker. At what rate does this speaker produce energy
Dawnelle prepares to dive off the 10m platform. What is the vertical acceleration of her center of mass
A muscle-tendon unit is composed of a tendon with a stiffness of 6640N/m, a muscle with a stiffness of 9070N/m, What is the stiffness of the muscle-tendon unit
In order to study the long-term effects of weightlessness, astronauts in space must be weighed (or at least "massed"). Find the mass of the astronaut
A force of 100 N is applied to a 50 kg mass in the direction of motion for a distance of 6.0 m, how much work is done by the varying force
The third-order fringe of 650 nm light is observed at an angle of 30°, How far apart are the slits
A laser beam of unknown wavelength passes through a diffraction grating having 5590lines/cm , At what angle will the next pair of bright spots occur
Coherent light from a sodium-vapor lamp is passed through a filter that blocks everything except for light of a single wavelength. find the wavelength of the light that falls on the slits
A 840-kg car starts from rest on a horizontal roadway and accelerates eastward for 5.00 s, What is the average force exerted on the car
A simple pendulum 2.0 m in length, is released at 25 degrees from the vertical. what is the speed at the bottom of the swing
A block of mass 2.50 kg is pushed 2.60 m along a frictionless horizontal table by a constant 14.0 N force directed 25.0ª below the horizontal. Determine the work done by the normal force exerted
A 4.8-kg bucket of water is raised from a well by a rope. find the force exerted by the rope on the bucket
A car is traveling at 41.0 km/h on a flat highway. If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop
A ball is thrown toward a cliff of height h with a speed of 29m/s and an angle of 60? ^\circ above horizontal. It lands on the edge of the cliff 3.5s later. How high is the cliff
A laser beam aimed from the earth is swept across the face of the moon. at what speed does the laser light move across the moon's surface
American football uses a field that is 100.0 yd long, whereas a soccer field is 100.0 m long. Which field is longer, and by how much
When the power is turned off on a turntable spinning at 59.0rpm, What is the angular acceleration (in rad/s2), of this turntable
An airplane propeller is rotating at 1250rpm. Compute the propeller's angular velocity
A laser beam aimed from the earth is swept across the face of the moon. what is the angle of divergence of the laser beam