A small trolley of mass 5 kg moves on a smooth straight track
PHYSICS · Multi-part · AP · Physics 1: Algebra-based · Force and Translational Dynamics · Force and Translational Dynamics
Problem
A small trolley of mass 5 kg moves on a smooth straight track. The horizontal forces acting on it change with time as described below.
(i) From t=0s to t=3s, two forces act simultaneously: 12 N towards the east and 7 N towards the west. Find the net force and the acceleration of the trolley during this interval.
(ii) At t=3s a new force of 5 N towards the east starts acting in addition to the previous two forces. Determine the net force and acceleration in the time interval 3s to 5s.
(iii) At t=5s the 7 N westward force is removed while the other two eastward forces continue. Find the net force and acceleration for t>5s.
(iv) Assuming the trolley starts from rest at t=0s, calculate its velocity at t=8s.