1. 7.3 Newton’s third law of motion Newton’s third law of motion Practical 7.3 Purpose To verify Newton’s third law of motion. Procedure 1.Set up the apparatus. computer force sensor datalogger interface force sensor carts Video: Practical 7.3

2. 7.3 Newton’s third law of motion Procedure 2.Make the carts collide with various initial velocities and record pairs of force readings with the force sensors. 3.Attach hooks to the force sensors and connect the hooks with a piece of string. 4.Move one of the carts to pull the other one and record pairs of force readings.

3. 7.3 Newton’s third law of motion How are the readings of the force sensors related? The force readings in each pair are always the same. Discussion Does the relation hold for both collision and pull? Yes.