A teacher conducts a test for five
students. He provides the marking
scheme and asked them to exchange
their scripts such that none of them
marks his own script. How many ways
can the students carry out the
marking?
A baggage tractor pulling luggage carts from an
airplane. The tractor has mass 6500 kg while
cart A has mass 2500 kg and cart B has mass
150 kg. The driving force acting for a brief
period of time accelerates the system from rest
and acts for 3s. (a) If this driving force is given
by F=820N. find the speed after 3s (b)
Wat is the horizontal force acting on the
conneting cable between the tractor and cart A
at this instant