A car with a mass of 1. 2 Ă— 103 kilograms starts from rest and attains a speed of 20 meters/second in 5 seconds. What net force acted on the car to cause that acceleration? A. 3. 0 Ă— 102 newtons B. 6. 0 Ă— 102 newtons C. 1. 2 Ă— 103 newtons D. 4. 8 Ă— 103 newtons E. 1. 2 Ă— 104 newtons.
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Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?
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Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton
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A car with a mass of 1. 2 Ă— 103 kilograms starts from rest and attains a speed of 20 meters/second...
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