Homework Answers
the potential energy is given by the formula
PE = mgh
where m = mass, g acceleration due to gravity, h = height of the object from earth surface
PE = (1300 kg)(10 N/kg)(4 m)
PE = 52000J
so last option is correct
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Part A Select the equation that shows that when a 3.0-kg book is lifted 1.0 m, its increase in gravitational potential energy is 30 J O PE vmgh 0 PE=mg O PE=mgh 2 Submit Next > Provide Feedback
Part A Select the equation that shows that a 1500000-J change in kinetic energy occurs for an airplane that is moved 300 m in takeoff by a sustained force of 5000 N. o W AKE F/d (5000 N)/(300 m) 1500000 J O w- AKE Fd2 (5000 N) (300 m)2 1500000 J o W AKE- Fd (5000 N) (300 m) 1500000J O W AKE 2Fd 2(5000 N)(300 m) 1500000 J Submit Provide Feedback Next >
is Select the equation that shows that the kinetic energy of a 3.0-kg book tossed across the room at a speed of 2.0 m/s 6.0 J. (1 J is equivalent to 1 kg(m/s)) KE=측mu-름(3.0 kg)(2.0 m/s)2=6.0J o KE-mu? (3.0 kg)(2.0 m/s) -6.0J KE-3mt, = (3.0 kg)(2.0 m/s) = 6.0 J O KE-|mu-4 (3.0 kg)(2.0 m/s)2=6.0J
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A small block with mass 0.0500 kg slides in a vertical circle of
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block's path, the normal force the track exerts on the block has
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exerts on the block when it is at the top of its path?
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