Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Question

secondary 4 | Physics
No Answers Yet

Help Adhvika! Anyone can contribute an answer, even non-tutors.

Answer This Question
Adhvika
Adhvika

secondary 4 chevron_right Physics chevron_right Singapore

how to do thus question? Please explain. Thanks!

Date Posted: 3 years ago
Views: 286
Eric Nicholas K
Eric Nicholas K
3 years ago
(b) looks correct.

As the ball rolls down the slope, its speed increases. In turn, the kinetic energy increases quadratically (since KE = 0.5 mv2). Since the total energy of the ball remains conserved, the PE will decrease in a manner similar to the increase of the KE to maintain the energy balance.
Arnold K H Tan
Arnold K H Tan
3 years ago
Since its a smooth/frictionless slope, no energy is loss due to work done against friction. Hence the total energy remains the same, so the rate of loss of KE = rate of gain of GPE, by the Principle of Conservation of Energy. Hence A is the best answer.