Question

SCIENCE

Chapter name :-Force and Pressure

Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion.

Answer 1

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➡️Forces acting on bucket are as follows:-

(i) Muscular force of arms acting upward.

(ii) Force of gravity acting downward.

Both the forces do not bring any change in the state of motion because both of them are acting in equal and opposite directions and thus they cancel each other’s effect.

Answer 2

ᴠᴀʀɪᴏᴜs ᴜɴɪᴛs ᴀʀᴇ ᴜsᴇᴅ ᴛᴏ ᴇxᴘʀᴇss ᴘʀᴇssᴜʀᴇ. sᴏᴍᴇ ᴏғ ᴛʜᴇsᴇ ᴅᴇʀɪᴠᴇ ғʀᴏᴍ ᴀ ᴜɴɪᴛ ᴏғ ғᴏʀᴄᴇ ᴅɪᴠɪᴅᴇᴅ ʙʏ ᴀ ᴜɴɪᴛ ᴏғ ᴀʀᴇᴀ; ᴛʜᴇ sɪ ᴜɴɪᴛ ᴏғ ᴘʀᴇssᴜʀᴇ, ᴛʜᴇ ᴘᴀsᴄᴀʟ (ᴘᴀ), ғᴏʀ ᴇxᴀᴍᴘʟᴇ, ɪs ᴏɴᴇ ɴᴇᴡᴛᴏɴ ᴘᴇʀ sǫᴜᴀʀᴇ ᴍᴇᴛʀᴇ (ɴ/ᴍ); sɪᴍɪʟᴀʀʟʏ, ᴛʜᴇ ᴘᴏᴜɴᴅ-ғᴏʀᴄᴇ ᴘᴇʀ sǫᴜᴀʀᴇ ɪɴᴄʜ (ᴘsɪ) ɪs ᴛʜᴇ ᴛʀᴀᴅɪᴛɪᴏɴᴀʟ ᴜɴɪᴛ ᴏғ ᴘʀᴇssᴜʀᴇ ɪɴ ᴛʜᴇ ɪᴍᴘᴇʀɪᴀʟ ᴀɴᴅ ᴜ.s. ᴄᴜsᴛᴏᴍᴀʀʏ sʏsᴛᴇᴍs. ᴘʀᴇssᴜʀᴇ ᴍᴀʏ ᴀʟsᴏ ʙᴇ ᴇxᴘʀᴇssᴇᴅ ɪɴ ᴛᴇʀᴍs ᴏғ sᴛᴀɴᴅᴀʀᴅ ᴀᴛᴍᴏsᴘʜᴇʀɪᴄ ᴘʀᴇssᴜʀᴇ; ᴛʜᴇ ᴀᴛᴍᴏsᴘʜᴇʀᴇ (ᴀᴛᴍ) ɪs ᴇǫᴜᴀʟ ᴛᴏ ᴛʜɪs ᴘʀᴇssᴜʀᴇ, ᴀɴᴅ ᴛʜᴇ ᴛᴏʀʀ ɪs ᴅᴇғɪɴᴇᴅ ᴀs ⁄ ᴏғ ᴛʜɪs. ᴍᴀɴᴏᴍᴇᴛʀɪᴄ ᴜɴɪᴛs sᴜᴄʜ ᴀs ᴛʜᴇ ᴄᴇɴᴛɪᴍᴇᴛʀᴇ ᴏғ ᴡᴀᴛᴇʀ, ᴍɪʟʟɪᴍᴇᴛʀᴇ ᴏғ ᴍᴇʀᴄᴜʀʏ, ᴀɴᴅ ɪɴᴄʜ ᴏғ ᴍᴇʀᴄᴜʀʏ ᴀʀᴇ ᴜsᴇᴅ ᴛᴏ ᴇxᴘʀᴇss ᴘʀᴇssᴜʀᴇs ɪɴ ᴛᴇʀᴍs ᴏғ ᴛʜᴇ ʜᴇɪɢʜᴛ ᴏғ ᴄᴏʟᴜᴍɴ ᴏғ ᴀ ᴘᴀʀᴛɪᴄᴜʟᴀʀ ғʟᴜɪᴅ ɪɴ ᴀ ᴍᴀɴᴏᴍᴇᴛᴇʀ.