Concept Development 4 1 Answers
Name
Class
Date
Concept-Development
Practice Page
4-1
Free Fall Speed
1. Aunt Minnie gives you $10 per second for 4 seconds. How much money do you have after 4 seconds?
$40
2. A ball dropped from rest picks up speed at 10 m per second. After it falls for 4 seconds, how fast is it going?
40 m/s
3. You have $20, and Uncle Harry gives you $10 each second for 3 seconds.
How much money do you have after 3 seconds?
$50
4. A ball is thrown straight down with an initial speed of 20 m/s. After 3 seconds, how fast is it going?
50 m/s
5s
5. You have $50 and you pay Aunt Minnie $10/second. When will your money run out?
© Pearson Education, Inc., or its affiliate(s). All rights reserved.
6. You shoot an arrow straight up at 50 m/s. When will it run out of speed?
5s
7. So what will be the arrow’s speed 5 seconds after you shoot it?
0 m/s
8. What will its speed be 6 seconds after you shoot it? 7 seconds?
10 m/s; 20 m/s
Free Fall Distance
1. Speed is one thing; distance another. Where is the arrow you shoot up at 50 m/s when it runs out of speed?
125 m
2. How high will the arrow be 7 seconds after being shot up at 50 m/s?
105 m
3. a. Aunt Minnie drops a penny into a wishing well and and it falls for 3 seconds before hitting the water. How fast is it going when it hits?
30 m/s
15 m/s
b. What is the penny’s average speed during its 3-second drop?
45 m
c. How far down is the water surface?
4. Aunt Minnie didn’t get her wish, so she goes to a deeper wishing well and throws a penny straight down into it at 10 m/s. How far does this penny go in 3 seconds?
75 m
CONCEPTUAL PHYSICS
Chapter 4
Linear Motion
13
Straight Up and Down
The sketch is similar to Figure 4.9 in the textbook.
Assume negligible air resistance and g = 10 m/s2.
• Table 1 shows the velocity data of the figure for t = 0 to t = 8 seconds.
Complete the table.
Distances traveled are from the starting point (the displacements).
• Table 2 is for a greater initial velocity. Complete it.
25
30
Class
Date
Concept-Development
Practice Page
4-1
Free Fall Speed
1. Aunt Minnie gives you $10 per second for 4 seconds. How much money do you have after 4 seconds?
$40
2. A ball dropped from rest picks up speed at 10 m per second. After it falls for 4 seconds, how fast is it going?
40 m/s
3. You have $20, and Uncle Harry gives you $10 each second for 3 seconds.
How much money do you have after 3 seconds?
$50
4. A ball is thrown straight down with an initial speed of 20 m/s. After 3 seconds, how fast is it going?
50 m/s
5s
5. You have $50 and you pay Aunt Minnie $10/second. When will your money run out?
© Pearson Education, Inc., or its affiliate(s). All rights reserved.
6. You shoot an arrow straight up at 50 m/s. When will it run out of speed?
5s
7. So what will be the arrow’s speed 5 seconds after you shoot it?
0 m/s
8. What will its speed be 6 seconds after you shoot it? 7 seconds?
10 m/s; 20 m/s
Free Fall Distance
1. Speed is one thing; distance another. Where is the arrow you shoot up at 50 m/s when it runs out of speed?
125 m
2. How high will the arrow be 7 seconds after being shot up at 50 m/s?
105 m
3. a. Aunt Minnie drops a penny into a wishing well and and it falls for 3 seconds before hitting the water. How fast is it going when it hits?
30 m/s
15 m/s
b. What is the penny’s average speed during its 3-second drop?
45 m
c. How far down is the water surface?
4. Aunt Minnie didn’t get her wish, so she goes to a deeper wishing well and throws a penny straight down into it at 10 m/s. How far does this penny go in 3 seconds?
75 m
CONCEPTUAL PHYSICS
Chapter 4
Linear Motion
13
Straight Up and Down
The sketch is similar to Figure 4.9 in the textbook.
Assume negligible air resistance and g = 10 m/s2.
• Table 1 shows the velocity data of the figure for t = 0 to t = 8 seconds.
Complete the table.
Distances traveled are from the starting point (the displacements).
• Table 2 is for a greater initial velocity. Complete it.
25
30