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Two force act on a 5.0kg object sitting on a frictionless horizontal surface. One force is 30 N in the +x direction, and other 35 N in the -x direction. What is the acceleration of the object?
question1the magnitude of four displacement vectors shown in the drawing are a 16.0 m b 11.0 m c 12.0 m and d 26.0
A beam of light passes through a polarizer and then an analyzer. find the angle between the axes of the polarizer and the analyzer
Speedboat A negotiates a curve whose radius is 150 m. Speedboat B negotiates a curve whose radius is 190 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
A proton accelerates from rest in a uniform electric field of 640N/C. At some later time, its speed is 1.20 X 10e6 m/s. What is its kinetic energy at the later time
In compressing the spring in a toy dart gun, 0.4 J of work is done. What is the dart's kinetic energy as it leaves the gun
We have studied four different laws authored by Sir Isaac Newton. For each of the following, indicate which law is best for the task described. Calculating the force exerted on a satellite by the Earth
A person pushes on a stationary 125 N box with 64 N at 30 deg below the horizontal, What is the force friction on the box
An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 21.5 m/s, What is the velocity of the end of the train as it leaves
Suppose a star the size of our Sun (R0 = 695,500 km) rotates at a speed of 1.0 revolution every 12 days. what would its new rotation speed be
A 100g cube of ice at 273k is dropped into 1kg of water that was originally at 353k. what is the final temperature of the water after the ice has melted?
The coefficient of kinetic friction is 0.400. Illustrate what should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero?
A rope is used to pull a 3.57 kg block at constant speed5.26 m along a horizontal floor. What is the work done by the rope's force
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