Lab 2

Experiment~ Force to Move objects from Rest.Objective~ To prove that the force required to move an object from rest is not different than the force required to keep the object moving.Hypothesis- The force is to move an object from rest has to be greater than the force required to keep the cart moving in order to really push the cart.Procedure~ 1. Cut a piece of string about 8” long. Tie one end to the front of the Hall’s cart and tie a loop in the free end.2. Put the 200 gram (g) mass in the Hall’s cart.3. Push the cart back and forth on the table and think about the problem statement. Write down your hypothesis before you continue.4. Zero the spring scale and attach the hook on the spring scale to the string on the loop on the cart.5. Tug on the spring scale several times to start the cart moving from rest. Note and record the spring scale reading every time.6. Now jerk on the spring scale several times to rapidly start the cart moving from rest. Note and record the spring scale reading every time.7. Finally, pull the cart across a table or floor at a constant speed several times. Note and record the readings each time. Try this step again, pulling the cart at a faster speed. Note and record the spring scale reading every time.8. Then my group and I will have to Analyze Results.Data- When Tugged: Trial 1 - .7n (70 g) Trial 2- 1n (100g) Trial 3- .7n (70g) When Jerked:Trial 1- .7n (70g)Trial 2- 1n (100g)Trial 3- 2n (200g) When at a Constant speed:Trial 1- .5n (50g)Trial 2- .8n (80g)Trial 3- .5n (50g)When at a faster Speed:Trial 1- 1.5n (150g)Trial 2- 1n (100g)Trial 3- 1.5n (150g)Conclusion~ After apply Second Newton Law this experiment we can now say that it takes more force to keep an object moving than just to get it to move. I also know that it takes more force to start an object moving quickly than it does to move an object slowly. My hypothesis was correct. I can say that this does follow Newton’s second law for a body at rest, because the cart moved when an external force was exerted. Since nothing went wrong I learned that this can be used in everyday life.