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Two horizontal forces, F1 and F2, are acting on a box. F2 can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that F1 = +2.4 N and the mass of the box is 4.8 kg. Find the magnitude and direction of when the acceleration of the box is
(a) +7.1 m/s2,
(b) -7.1 m/s2, and
(c) 0 m /s2.
Explain how long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 425 {rm m}?
the virgo cluster contains about 1300 galaxies and is at a distance of 16 mpc. the galaxies have an rms velocity about
A 0.25-kilogram mass on a vertical spring oscillates at a frequency of 2.0 Hz. If a 0.60-kilogram mass were instead suspended from the same spring, what would be the frequency of oscillation
A force of 17 N is applied to the end of a 0.63 m long torque wrench at an angle 45° from a line joining the pivot point to the handle
Determine the magnitude and direction of impulse delivered to the ball by the floor.
One of the problems of in-air testing of nuclear weapons (or, even worse, the use of such weapons!) is the danger of radioactive fallout. What percent of the original level of is left after 56 years
An elevator (mass 4600 ) is to be designed so that the maximum acceleration is 0.0650 What is the maximum force the motor should exert on the supporting cable
A person exerts a horizontal force of F = 190 N in the test apparatus. (h of arm = 0.34 m. And h of flexor muscle= .054 m) Find the horizontal force M that his flexor muscle exerts on his fore arm.
A thin 1.7-m metal rod sustanins a longitudinal standing wave with vibration antinodes at each end of the rod. What is the frequency of the rod's vibration
A small camera has a lens with focal length f=15 mm has a movable lens that can be focused on objects as close as 20 cm or as far away as infinity (relative to f). What is the optimum lens-film distance
a projectile is fired horizontally from a gun that isnbsp61.0nbspm above flat ground emerging from the gun with a speed
A car initially traveling eastward turns north by traveling in a circular path at uniform speed, Determine the car's average speed
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