The sock and sand ball is less likely to dent the cardboard because it will deform upon impact, absorbing the potential energy from falling. The solid wood ball will not deform and thus its energy will be transferred to denting the cardboard. The Moon has little atmosphere because its gravity is much weaker than Earth's, so it cannot retain gases forming on its surface due to the low gravity.

1. Q 5 You have 2 balls of the same size and mass. One is made of solid wood and the other is
made by filling the end of a sock with sand. Both balls are dropped from the same height onto a
thick cardboard sheet. Which ball is more likely to make a dent in the cardboard sheet and why?
Q 6 Part of the reason the Moon has very little atmosphere is that there are no processes
happening on the Moon that produce gasses. Another part of the puzzle is that the temperatures
on the surface can get as high as 123 Celsius. What is the other reason for the Moon having very
little atmosphere? (Mass of the moon 735 x 10%2kg, mass of a nitrogen molecule 2.34 x 10-
26kg, radius of the moon 1.74 x 10°m, gravitational constant 6.67 x 10"Nm'/kg')
Solution
5) the solid wood ball is more likely to make dent in the cardboard. This is because the ball made
of sock and sand will undergo deformation on striking the cardboad,and hence will absorb most
of the potential energy that the ball had before falling. Whereeas, the hard ball will not deform
and therefore make a dent on the cardboad,because in this case the cardboard is deforming to
aborb the initial potential energy of wood ball
6) The other reason is that the acceleration due to gravity on moon is much less than that on
Earth and therefore cannot retain the gases formed