Lab 4:

1. Procedure I.1
The measured mass of the puck is ...

• A. 0.029 kg
• B. 0.065 kg
• C. 0.05 kg
• D. 0.038 kg
• E. 0.151 kg

2. Procedure I.5
The mass of the hunger is...

• A. 0.041 kg
• B. 0.087 kg
• C. 0.2 kg
• D. 0.005 kg
• E. 0.001 kg

3. Questions 3, 4 and 5 are based on the following video of a simulation. (The data for calculating the acceleration of the puck-hanger system will be obtained from the simulation)

The measured height from which the hanger is dropped is...

• A. 36.7 m
• B. 47.8 m
• C. 57.4 m
• D. 65.5 m
• E. 75.5 m

4. Use the stop watch of your phone or your watch to measure the time taken for the hanger to fall. (You might want measure the time taken for 5 falls and divide by 5.)
The time taken for the hanger to fall is closer to...

• A. 8.4 s
• B. 7.8 s
• C. 6.2 s
• D. 12.8 s
• E. 9.5 s

5. Using one of the equations of gravitational motion, (initial speed is zero) height = 0.5*acceleration*(time)² So the acceleration can be calculated from acceleration = 2 * height /(time)²
Calculate the acceleration. The acceleration is...

• A. 1.452 m / s₂
• B. 3.356 m / s₂
• C. 1.272 m / s₂
• D. 0.876 m / s₂
• E. 2.543 m / s₂

6. Procedure I.11
The calculated value of the gravitational acceleration is ...

• A. 11.2 m/s²
• B. 8.943 m/s²
• C. 7.546 m/s
• D. 9.453 m/s²
• E. 10.939 m/s²

7. (Skip Procedure I 12 & 13) Procedure I.14
The percentage error between the calculated and accepted value (9.8 m/s²) of the gravitational acceleration is...

• A. 1.246%
• B. 11.626%
• C. 5.264%
• D. 7.075%
• E. 12.674%