The speed of a dart of mass 120g is reduced from 180ms-1 to 100ms-1 when it passes through a book of thickness 3.0cm. Calculate:
A) the loss of kinetic energy of the dart
B) the average frictional force exerted by the book on the dart
any help on either question would be very much appreciated
A) the loss of kinetic energy of the dart
B) the average frictional force exerted by the book on the dart
any help on either question would be very much appreciated