Physics
The picture below shows a boy climbing a rope ladder hanging from the branch of a tree. The boy in the picture finds it difficult to climb the ladder as it turns about the axis where he is holding. The instructor tells the boy to stretch the body with the hands stretched up and make the body parallel to the ladder and climb
(a) Which force caused the ladder to turn?
(b) How does keeping the body parallel to the ladder make climbing easier?
Related Questions
Anu and Amy purchased ice creams in plastic balls and cones, respectively, during their outing at the science fair. After consuming their ice creams, Anu stated that regardless of whether they were filled with ice cream or empty, the centre of gravity of the objects would remain unchanged. Do you agree with Anu? Why?
Regenerative braking involves harnessing the energy that is typically lost when a car decelerates and brakes and instead using it to recharge the car's batteries. Unlike traditional braking systems that simply dissipate energy, regenerative braking allows some of that energy to be recycled.
(a) What is the energy conversion process that results in the wastage of energy in a normal car during braking?
(b) How does regenerative braking differ from normal braking in terms of energy conversion?
John is trying to create musical notes using water-filled bottles, as shown in the picture.
Which of the bottles is likely to produce a musical note with the highest pitch? Give reasons.
When Shyam, the band leader, struck both the bass drum and the kettle drum with equal force, the bass drum emitted a sound measuring 120 dB, whereas the kettle drum produced a sound of 90 dB. Explain this discrepancy in the loudness.