![National Geographic on Twitter: "Access to clean water is still a challenge for nearly a billion people around the world #sponsored @proctergamble https://t.co/UggllDSKPO" / Twitter National Geographic on Twitter: "Access to clean water is still a challenge for nearly a billion people around the world #sponsored @proctergamble https://t.co/UggllDSKPO" / Twitter](https://pbs.twimg.com/media/EG23snWX4AUxfhG.jpg:large)
National Geographic on Twitter: "Access to clean water is still a challenge for nearly a billion people around the world #sponsored @proctergamble https://t.co/UggllDSKPO" / Twitter
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![Person Filling Up Bucket of Water in Slow Motion Stock Video Footage 00:22 SBV-316503083 - Storyblocks Person Filling Up Bucket of Water in Slow Motion Stock Video Footage 00:22 SBV-316503083 - Storyblocks](https://dm0qx8t0i9gc9.cloudfront.net/thumbnails/video/gVUQIU4/videoblocks-person-filling-up-bucket-of-water-in-slow-motion_ruz1xinalb_thumbnail-1080_01.png)
Person Filling Up Bucket of Water in Slow Motion Stock Video Footage 00:22 SBV-316503083 - Storyblocks
A person pulls a bucket of water from a well of depth h . If the mass of uniform rope is m and that of the bucket full of water is M ,
![Filling Bucket Water Slow Motion Closeup Stock Footage Video (100% Royalty-free) 8950921 | Shutterstock Filling Bucket Water Slow Motion Closeup Stock Footage Video (100% Royalty-free) 8950921 | Shutterstock](https://ak1.picdn.net/shutterstock/videos/8950921/thumb/1.jpg?ip=x480)