For such questions, it is useful to understand conservation of energy. Work done by the pushing force = GPE + KE + work done against...

Answer: Option D The most common mistake is to equate total energy at X equals to total energy at Y. At Y, there is no way to know the...

Answer: Option B Using conservation of energy (COE), the total energy of the car at X = total energy at Y. At X, the car only has...

Answer: Option C With first glance, we may think of using kinematics to solve. It can, but the process will be longer. Refer to the...

Ans: Option C