Experiment Five

Objectives: We were to see if inreasing the force on an object increases the acceleration of the object.Hypothesis: 1.The speed of the cart getsfacter when the washers are added to the paper clips.2.The acceleration will become greater. The more force the faster the cart will move.Materials: Steel rod, tape, string, paperclip, washers, and halls cart.Procedures: 1. Tape the steel rod to the edge of a table so that it s directly over the edge. This will act to reduce friction in the experiment.2. Cut a piece of string 1 meter long. Attach one end of the string to the Hall’s cart using a paper clip.3. Open up a paper clip to form a loop on one end and a hook on the other. Tie the loop end of the paperclip to the free end of the string.4. Put the cart on the table about ¾ of a meter from the rod and hang the end of the paperclip over the rod. 5. Add washers to the paperclip hook one at a time until the cart begins to move (it should take 1-3 washers). Carefully observe the speed of the cart as it moves along the table. Repeat 4-5 times and record the number of washers used each time.6. Think about doubling or tripling on the cart by doubling or tripling the number of washers. Write your prediction down as a hypothesis. 7. Repeat step 5, but this time double the force by doubling the number of washers. Observe the speed and acceleration of the cart carefully. Repeat several times. Record your results.8. Repeat step 7, but this time triple the number of washers used in step 5. Observe the speed and acceleration of the cart carefully. Repeat several times. Record your results. Data:Trial 1: 1. Moved a little, went at a slow speed.2. Moved a lottle went slow again3. moved father and hit the rod.4. Moved at a faster speed and the washers hit the ground.Trial 2:1. Moved at a medium speed.2. The cart moved at a medium speed it hit the rod.3. The cart moved at a constant speed.Trial 3:1. The cat moved fast, the cart hit the rod.2. The cart went faster and almost fell over the rod.3. The cart fell off the table over the rod. Conclusions:*The force use to increse the speed of an object quickly will be greater then the force use to increase the speed of an object slowly. My hypothesis was correct. Yes the force follows the formula.

Experiment 4

Objectives: To see if it takes more force to change the speed or direction of a moving object. Then the initial speed.

Hypothesis: The force will be greater than because if you want to change the speed then you have to put in more work.

Materials: 200 g mass, string, spring scale, cart

Procedures: 1. Set up the equipment
2. We pulled on the string 4-5 times to see what changes we could find.
3. Recorded our results.
4. Then we pulled the string in an arc direction to see the changes we could find.
5. Recorded our results.

Data 1:
a. 100g
b. 150g
c. 100g
d. 120g
e. 150g

Data 2:
a. 200g
b. 150g
c. 200g
d. 150g
e. 100g

Analyze
It takes more force to maintain it's initial speed. Because you would have to push the cart harder to get the speed to accelerate. I t takes mote force to change the direction of the cart. When you change the direction you pull harder which causes the spring scale grams to go up.
My conclusions was correct.

Experiment 3

Objective: To see if objects in motion really continue in motion unless acted upon by a external force.
Hypothesis: I think the 100gram will fall of the top.
Materials: 100g mass, ramp, cart, duck tape, card board
Procedures: 1. We put the card board on the top cart.
2. Taped two pieces of tape to the card board so it would stay together.
3. Place to 100g mass gently on the top of the card board.
4. Push the cart gently so that it hit the ramp. But always so that the mass don't come off before it hits.
5. Recorded our data

Data:
a. The mass went forward and landed on the ramp.
b. The mass went forward.
c. The mass fell backwards onto the floor.
d. The mass fell on the back wheel e. The mass fell flat to the ground.
Conclusion: The weight is knocked off of the cart. A force is acted upon. In this case the force is the ramp. Yes my hypothesis was correct. The weight did fall of the ramp.

Experiment #1 Objective: We were to see if the cart when it was at rest would remain at rest unitl we moved it.Hypothesis: I belevie that the cart will move backwards.Procedures: 1. Place the cart on the wood board. 2. Pull the borad from under the cart about four or five times.3. Record your data.Data: Observation 1 The cart moved up and then backwards.Observation 2 The cart stayed in the same position and dropped off the board. Observation 3 The cart dropped and moved forward a little bit.Observation 4 The cart moved a little side ways. Materials: Wood Board, plastic cart and table.Conclusions: The cart moved a little bit and dropped to the table when the borad was pulled from underneath. My hoypothesis was correct the cart did now back, but only when the borad was moed that the cart was able to move. Yes it follows the first law. The cart did not move when it was not touched. Until it was moved by an outside force which was the borad.

Experiment #2Oblectives: To see if the force required to an oblect from rest different from the force required to keep an object in move.Hypothesis: The force will be greater if there is no movement in the cart. then it would be if the cart was already moving.Materials: 2000 gram weight, Cart, string, ScaleProcedures: First we put the weight inside of the Cart.2. Tied the string up to the front of the cart.3. Then attached the the scale to the string.4. We pulled, tuged and jerk the cart to see the results.5. Recorded the data.Data: Tug Jerk Pull20g-.2n 110-1.1n 200-2n10g-.1n 100-1n 200-2n30-.3n 120-1.2n 150-1.5n50-.5n 100-1n 200-2.5n30-.3n 1201.2n 250-2.5nConclusions: It takes more force to start an object if it is not moving already then if it if already was moving. It takes more force to start an object moveing slowly then to start an object that is moving quikly. My Hypothesis was correct.