Exercise : motion

P R O B L E M S


1.   A bicyclist starts from rest and after traveling
along a straight path a distance of 20 m reaches a speed
of 30 km/h. Determine his acceleration if it is constant.
Also, how long does it take to reach the speed of 30 km/h?


2.   A car starts from rest and reaches a speed of 80 ft/s
after traveling 500 ft along a straight road. Determine its
constant acceleration and the time of travel.
3.   A stone A is dropped from rest down a well, and
in 1 s another stone B is dropped from rest. Determine
the time interval between the instant A strikes the water
and the instant B strikes the water. Also, at what speed
do they strike the water?



4.   Ball A is released from rest at a height of 40 ft
at the same time that a second ball B is thrown upward
5 ft from the ground. If the balls pass one another at a
height of 20 ft, determine the speed at which ball B was
thrown upward.