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Physics
Physics
Problem
Three carts P, Q and R move on a straight track. P: mass
1
kg
1\,\text{kg}
1
kg
, speed
10
m/s
10\,\text{m/s}
10
m/s
Q: mass
2
kg
2\,\text{kg}
2
kg
, speed
7
m/s
7\,\text{m/s}
7
m/s
R: mass
4
kg
4\,\text{kg}
4
kg
, speed
5
m/s
5\,\text{m/s}
5
m/s
Arrange the carts in ascending order of kinetic energy. a)
P
<
Q
<
R
P < Q < R
P
<
Q
<
R
b)
R
<
Q
<
P
R < Q < P
R
<
Q
<
P
c)
Q
<
P
=
R
Q < P = R
Q
<
P
=
R
d)
P
=
Q
<
R
P = Q < R
P
=
Q
<
R
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