Question #e1ca3

1 Answer
A08
Feb 22, 2017

You got it correct.

Explanation:

Let the speed of 2kg ball be #=v# #ms^-1#
1kg ball has speed #=2v# #ms^-1#
Kinetic energy is given as #=1/2mv^2# ......(1)

Using equation (1) we get
#KE_"2kg"=1/2 (2)v^2=v^2# .....(2)
and #KE_"1kg"=1/2(1)(2v)^2=2v^2# ......(3)

Dividing (2) with (3)
#(KE_"2kg")/(KE_"1kg")=v^2/(2v^2)#
#=>(KE_"2kg")/(KE_"1kg")=1/(2)#

#=># Compared to the 1kg ball, the 2kg ball has half the kinetic energy.

Related questions
See all questions in Energy
Impact of this question
1309 views around the world
You can reuse this answer
Creative Commons License