Question

The kinetic energy of an object of mass m,moving with a velocity of 5m/s is 25 J.What will be its kinetic energy when its velocity is doubled?What will be its kinetic energy when its velocity is increased three times?

Answer 1

if velocity is increased by doubled then kinetic energy will be 100 J

Answer 2

ʟᴇᴛ ᴛʜᴇ ᴍᴀss ʙᴇ ᴍ

ᴠ = 5ᴍ/s

ᴋ.ᴇ = 25 ᴊ

ᴋ.ᴇ = 1/2 ᴍᴠ^2

25 = 1/2 ᴍ (5)^2

25 x 2 = 25ᴍ

ᴍ = 2 ᴋɢ

ɴᴏᴡ ɪғ ᴛʜᴇ ᴠᴇʟᴏᴄɪᴛʏ ʙᴇᴄᴏᴍᴇs 3 ᴛɪᴍᴇs ᴛʜᴇɴ ᴛʜᴇ ᴠᴇʟᴏᴄɪᴛʏ ɪs 3 x 5 = 15ᴍ/s

ɴᴏᴡ ɴᴇᴡ ᴋ.ᴇ = 1/2 x 2 x 15^2

= 225 ᴊ.