A Levels Physics

A small mass is placed at point P on the inside surface of a smooth hemisphere. It is then
released from rest. When it reaches the lowest point T, its speed is 4.0 ms-'.
The diagram (not to scale) shows the speed of the mass at other points Q, R and S as it slides
down. Air resistance is negligible.
1.0 ms-1
not to
smooth
2.0 ms-1
scale
R
hemisphere
3.0 ms-1
4.0ms-1
T
The mass loses potential energy E in falling from P to T.
E
At which point has the mass lost potential energy
A Q
B R
C S
D none of these


Kinematics | 2014 - M/J - 9702/12 | Q15