Objectives: The objective for this lab was to address this question “Is the force required to move an object from rest different from the force required to keep an object moving?”

Materials: Ramp, String 8”, Cart, Wood, Table, 200gram Weight, Ruler

Hypothesis: I think that the force required to move the cart from greater than the cart moving.

Procedures:

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 mass in the Hall’s cart.
3. Push the cart back and forth on the table and think about the problem statement.
4. Zero the spring scale and attach the hook on the spring scale to the spring 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 readings.
6. Now jerk on the spring scale several times rapidly start the cart moving from rest. Note and record the spring scale readings.
7. Finally, pull the cart across a table or floor at a constant speed several times. Note and record the spring scale reading each time. Try this step again, pulling the cart at a faster speed and record your results.
8. I had to analyze my results.

Data:

Trials	Newton’s	Grams
1	.5n	50g
2	.5n	50g
3	.5n	50g
4	5n	500 g
5	2.5n	250g
6	1.5n	150g
7	10n	100g
8	.5n	50g
9	1n	100g

Conclusion: My hypothesis was incorrect. I predicted that the force required to primarily moving an object from rest would be greater than the force that is required to keep that object moving. In reality, it took a very small amount of force to start the cart.

Objectives: The objective for this lab was to address this question “Do objects at rest really remain at rest unless acted upon by external forces?”

Materials: Ramp, Cart, Wood, Table

Hypothesis: I think if you pull the ramp from underneath that the cart will fall onto the floor.

Procedures:

1. Set the wooden ramp on a table with about 12” of the ramp extending over the edge of the tables.

2. Place the Hall’s cart pm is the (art of the ramp that is over the table. The cart at this point is in a state of rest.

3. Standing to one side, quickly jerk the ramp out from underneath the Hall’s cart. Try this 4-5 times. Record your observations.

4. Analyze your results.

Data:

Trial 1: The cart did not fall or roll. It just slides onto the table backwards.

Trial 2: The cart did the same thing it in trial 1.

Trial 3: The cart slide off of the left side of the ramp.

Trial 4: The cart did the same thing it did in trial 1 & 2.

Conclusion: My hypothesis was somewhat correct. I predicted that the cart would fall off the ramp and onto the floor. In addition, the cart fell off the ramp; it did not fall onto the floor. The cart did not follow Newton's first law for a body at rest. Displayed by data, the cart did not stay at rest. The car moved only when applied a certain amount of force.