Question

An object of mass 100kg is accelerated uniformly the velocity of 5m per second to 8m per second in 6 second. Find the magnatis force

Answer 1

Answer:

Initial momentum=mass*initial velocity=(100*5)=500kg m/s

Final momentum=mass*final velocity=(100*8)=800 kg m/s

Force=Rate of change of momentum

Force=m(v-u)/t

=100(8-5)/6

=100*3/6=50 N

Answer 2

ɪɴɪᴛɪᴀʟ ᴍᴏᴍᴇɴᴛᴜᴍ=ᴍᴀꜱꜱ*ɪɴɪᴛɪᴀʟ ᴠᴇʟᴏᴄɪᴛʏ=(100*5)=500ᴋɢ ᴍ/ꜱ

ꜰɪɴᴀʟ ᴍᴏᴍᴇɴᴛᴜᴍ=ᴍᴀꜱꜱ*ꜰɪɴᴀʟ ᴠᴇʟᴏᴄɪᴛʏ=(100*8)=800 ᴋɢ ᴍ/ꜱ

ꜰᴏʀᴄᴇ=ʀᴀᴛᴇ ᴏꜰ ᴄʜᴀɴɢᴇ ᴏꜰ ᴍᴏᴍᴇɴᴛᴜᴍ

ꜰᴏʀᴄᴇ=ᴍ(ᴠ-ᴜ)/ᴛ

=100(8-5)/6

=100*3/6=50 ɴ