Grade 11 Physics11
Grade 11 Physics: Summative Cart Analysis Report 2012 – 2013
Purpose: • To build a gravity cart that moves by using the gravitational potential energy from a falling mass. • To record the motions of the cart by and analyze the motions through d-t, v-t, and a-t graphs. • To find the efficiency of energy and explain the factors those cause the loss in energy.
Procedure
Building cart
1. The materials for the cart were gathered.
- Shoebox (1)
- Pole (2) [0.75cm radius]
- Axle (2) [0.1cm radius] [0.3cm radius]
- String
- Wheels (2) [5.5cm radius]
- CD (2) [6cm radius]
- Thin stick
- Pulley
- Tape
2. The shoebox and the poles were measured and marked at places for drilling.
3. Four holes were drilled on the shoebox with electric drill. (Larger than the axles to reduce friction from the cardboard on the axles)
4. A hole was drilled near the top of each pole.
5. The box was cut on the two sides and the poles were inserted and taped onto the cart.
6. The string was wrapped around the back axle.
7. A CD was attached on the front axle, and a wheel on the rear axle. (The rear wheels were drilled to the rights sizes to allow the axle to fit)
8. The axles were put through the box and the wheels on the other sides are attached.
9. The stick was used to connect the two poles, and the pulley was hanged.
Taking Data
1. The string was put through the pulley, and the mass(500mL can) was attached to the string.
2. The can was put on the base of the cart.
3. The can was raised up to let it fall; the cart was tested until it was set to run a distance between 2m to 3m.
4. The ticker tape was attached to the rear end of the cart.
5. The ticker tape was put through the ticker tape timer and the carbon paper was set up.
6. The can was raised and the level was marked.
7. The ticker tape timer was turn on and the cart can was allowed to drop.
8. The data was recorded.
Free Body Diagram Fnormal
0 – 1.4s
FappliedX1
FfrictionX
Fg
Purpose: • To build a gravity cart that moves by using the gravitational potential energy from a falling mass. • To record the motions of the cart by and analyze the motions through d-t, v-t, and a-t graphs. • To find the efficiency of energy and explain the factors those cause the loss in energy.
Procedure
Building cart
1. The materials for the cart were gathered.
- Shoebox (1)
- Pole (2) [0.75cm radius]
- Axle (2) [0.1cm radius] [0.3cm radius]
- String
- Wheels (2) [5.5cm radius]
- CD (2) [6cm radius]
- Thin stick
- Pulley
- Tape
2. The shoebox and the poles were measured and marked at places for drilling.
3. Four holes were drilled on the shoebox with electric drill. (Larger than the axles to reduce friction from the cardboard on the axles)
4. A hole was drilled near the top of each pole.
5. The box was cut on the two sides and the poles were inserted and taped onto the cart.
6. The string was wrapped around the back axle.
7. A CD was attached on the front axle, and a wheel on the rear axle. (The rear wheels were drilled to the rights sizes to allow the axle to fit)
8. The axles were put through the box and the wheels on the other sides are attached.
9. The stick was used to connect the two poles, and the pulley was hanged.
Taking Data
1. The string was put through the pulley, and the mass(500mL can) was attached to the string.
2. The can was put on the base of the cart.
3. The can was raised up to let it fall; the cart was tested until it was set to run a distance between 2m to 3m.
4. The ticker tape was attached to the rear end of the cart.
5. The ticker tape was put through the ticker tape timer and the carbon paper was set up.
6. The can was raised and the level was marked.
7. The ticker tape timer was turn on and the cart can was allowed to drop.
8. The data was recorded.
Free Body Diagram Fnormal
0 – 1.4s
FappliedX1
FfrictionX
Fg