CBSE Class 8 Answered
(i) What happens when we rub a plastic object like a pen or a comb with hair? Which type of force is operating in this case? (ii) Why are skis used to glide over snow?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(i) When we rub a plastic object like a pen or a comb with hair, it gets electrically charged. When such an object is brought close to tiny bits of paper, the bits of paper get attracted to the object. This is due to electrostatic force.
(ii) Skis have a large surface area to reduce the pressure on snow. This ensures that the skis do not sink in too far in the snow.
(ii) Skis have a large surface area to reduce the pressure on snow. This ensures that the skis do not sink in too far in the snow.
Answered by | 04 Jun, 2014, 03:23: PM
Concept Videos
-
Force and Pressure
Concept of non-contact forces, their characteristics & examples.
CBSE 8 - Science
Asked by r68091982 | 19 Apr, 2024, 07:32: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by aryupal.rpal | 17 Jan, 2022, 09:45: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by rajjeets030 | 11 Aug, 2021, 11:08: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by kudipudibalasai | 28 Jul, 2021, 08:16: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by abkdhruv18 | 17 Jun, 2020, 12:17: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by tronak75439 | 19 Feb, 2020, 09:53: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by kirtigore63 | 04 Sep, 2019, 06:49: PM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by Topperlearning User | 09 May, 2014, 11:02: AM
ANSWERED BY EXPERTCBSE 8 - Science
Asked by Topperlearning User | 09 May, 2014, 10:46: AM
ANSWERED BY EXPERT
