A car with a mass of 860 kg sits at the top of a 32 meter high hill. Describe the transformations between potential and kinetic
1 answer:
Answer:
Kinetic energy at the bottom equals potential energy at the top hence 269971.2 J
Explanation:
Assuming no friction and neglecting air resistance, from the law of conservation of energy, the potential energy that the car posses at 32 m is all converted to kinetic energy hence
PE= mgh
Here m denotes the mass of the car, g is acceleration due to gravity, h is the height and v is the speed of the car
The potential energy will be PE= 860*9.81*32=269971.2 J
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where the first term is the resultant of the forces acting on the body, m is the mass of the object and a its acceleration, we see that if no forces act on the object, then the acceleration is zero. Therefore, the acceleration of the object is zero, and its velocity remains constant.