Answer: Option A

Answer: Option C

Answer: Option C

Answer: Option A

Answer: Option B This question can be solved using both Conservation of Energy and Kinematics. Indeed, using COE to solve will be much simpler and straight forward. But do know both methods.

Answer: Option A

Answer: Option A View the explanation

Answer: Option D View the video for explanation

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...

This question is very straight forward. As both P and Q are copper, the density will be the same. But many are unsure of KE. Let look at...

The video below demonstrates that water will find its own level. An question requires this concept: An apartment block receives water...

Ans: Option C

First astronauts launched by SpaceX returned home safely on 3 Aug 2020.

Page 4 of Work Energy and Power: Understanding COE

There are 3 scenarios with slight variations. Calculate the force F needed to pull the block up the inclined plane. View the video below...