Work is done on an object to increase its total energy. Which one of the followi

Question

Work is done on an object to increase its total energy. Which one of the following is true? The total work done must be equal to the energy lost to heat and sound Both the kinetic energy and potential energy can be larger If the potential energy increases, then the kinetic energy must decrease The object must have a larger speed and smaller height above the ground. If the kinetic energy of an object increases, then the potential energy must decrease. the total energy must increase. there can only be one force on the object. the speed must increase as well. If an object has a larger potential energy than kinetic energy. the speed of the object will increase. the speed of the object will not change. the speed of the object will decrease. It is not possible to predict what the speed will be; it depends on the situation.

Explanation / Answer

Q8 : (B) if work is done on the object then it's total energy will increase I. E. Both kinetic and potential energy can be larger.

Q9 : (D) . Kinetic energy depends on speed. As kinetic energy increases its speed must increase.

Q10 : (A) every body tends to acquire minimum potential energy so potential energy of the body decreases and hence kinetic energy increases therefore speed increases

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