Cut the bottom off a plastic soda or water bottle and screw a cap from a glue bottle on in place of the lid. Suspend the bottle from a tripod and center it over a large sheet of paper. Fill the bottle with thin paint and set the pendulum in motion. The design of the pendulum will be tracked from the falling paint on the floor. The motion creates a symmetrical splatter. Try the project several times with different swinging speeds and rope lengths, graphing the results.

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.

D.) a wheel barrow, due to the fact that where the weight is in the middle, the fulcrum is at the wheel, and the input force is at the other end