Determine the magnitude of the acceleration of the rock
A rock of mass 44 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 252 N. What is the magnitude of the acceleration of the rock?
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The Coulomb constant is 8.9875 109 N m2/C2. What is the magnitude of the total elec trostatic force on a third particle with charge 9 C placed on the x-axis at 2 cm?
A 3.0-m-long rigid beam with a mass 120 {rm kg} is supported at each end. An 70 {rm kg} student stands 2.0 {rm m} from support 1. How much upward force does support 1 exert on the beam?
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It takes 140 J of work to move 2.7 C of charge from a positive plate to a negative plate. What voltage difference exists between the plates?
What is the magnitude of the maximum torque the crane can withstand if the maximum load the crane can handle is 738 N? What is the maximum load for this crane at an angle of 15° with the horizontal?
A 5.00-kg ball, moving to the right at a velocity of +2.00 m/s on a frictionless table, collides head-on with a stationary 7.50-kg ball. Find the final velocities of the balls if the collision is (a) elastic and (b) completely inelastic.
A student drops a ball from a height of 15.6 m and measures the time it takes to hit the ground as 1.81 s. In calculating the gravitational acceleration g (in order to compare to its theoretical value 9.8 m/s^2, which of the following is correct?
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