Question

Your physical education teacher throws a ping-pang ball to you at a certain speed an you catch it. The teacher is next going to throw you basket ball whose mass is ten times the mass of the ping-pang ball. You are given the following choices. You can have the basket ball throws with
I. The same speed as the ping-pang ball
II. The same momentum, or
III. The same kinetic energy. rank these choices from easiest to hardest to catch i.e., in order of impulse needed to apply.
A. I,II,III
B. III,II,I
C. II,III,I
D. All 3 are equally easy

Answer 1

Correct Answer - C
`J_(1)=10 mv`
`J_(2)=mv`
`k=(p^(2))/(2m)rArr p=sqrt(2mk)`
`J_(3)=sqrt(10)xxmv`