Physics 1101
Experiment 9
Name_________________________________
Pre Lab
Instructor name _________________________
1. Define average velocity and average acceleration. How does a smart pulley work? (7pts)
2. (a) Explain the difference between constant velocity and constant acceleration. Are you more
likely to be able to walk at constant velocity or at constant acceleration? Explain you reasoning.
1
(b) For the equation 𝑥 = 𝑥0 + 𝑣0 𝑡 + 2 𝑎𝑡 2 , what does a graph of 𝑥 versus 𝑡 look like? What
does the graph look like if 𝑎 = 0? (10pts)
3. For the following position versus time values, calculate the average velocity for each of the
four time intervals. What is the physical meaning of a negative average velocity? Please show all
calculations carefully. (8 pts)
𝑃𝑜𝑠𝑖𝑡𝑖𝑜𝑛 (𝑚)
1.21
1.59
2.53
2.15
2.05
𝑇𝑖𝑚𝑒 (𝑠)
1.05
1.73
2.13
2.80
3.05
4. A Formula 1 racer starts from rest and accelerates at 8.15 𝑚/𝑠 2. How far has he traveled at
(𝑎) 2.00 𝑠, (𝑏) 4.00 𝑠 and (𝑐) 8.00 𝑠? Please show detailed calculations and equations that were
used. (15pts)
5. A person steps off the end of a 3.00 𝑚 high diving board and drops to the water below. (a)
How long does it take for the person to reach the water? (b) What is person’s speed on entering
the water? (c) What is person’s speed on entering water if they step off a 10.0 𝑚 diving tower?
Please show detailed calculations and equations that were used. (20 pts)