Skip to content
free
K
1
2
practice
Home
Math
English
Science
Social Studies
Contact
Language
English
Español
Sign In
/
Math
/
Calculus I
/
Work Done by a Variable Force
Grade Level
Calculus I
CAL1.132 Work Done by a Variable Force
0%
Skill Level
🔴 Hard
00:00
Progress to Next Level
25% to Medium
Easy
Medium
Hard
Mastery
100%
A force is 6 N for 0 <= x <= 2, then increases linearly from 6 N at x = 2 to 18 N at x = 5, then stays 18 N until x = 7. Which setup and work are correct?
A
int_0
7
6 dx = 42 J
B
int_0
2
(4x - 2) dx + int_2
5
6 dx + int_5
7
18 dx = 50 J
C
int_0
2
6 dx + int_2
5
(4x - 2) dx + int_5
7
18 dx = 84 J
D
int_0
2
6 dx + int_2
5
(4x - 2) dx + int_5
7
18 dx = 84 N
Submit Answer