Top Posters
Since Sunday
14
d
7
o
6
j
6
n
5
d
5
r
5
H
5
c
5
l
5
i
5
m
5
New Topic  
tankster tankster
wrote...
Posts: 851
Rep: 6 0
5 years ago
If you walk 5.0 m horizontally forward at a constant velocity carrying a 10 N object, the amount of work you do is
A) more than 50 J.
B) equal to 50 J.
C) less than 50 J, but more than 0 J.
D) zero.
Textbook 

Physics


Edition: 4th
Author:
Read 235 times
2 Replies
Replies
Answer verified by a subject expert
Raj.SRaj.S
wrote...
Top Poster
Posts: 853
5 years ago
Sign in or Sign up in seconds to unlock everything for free
More questions for this book are available here
D

Concept: Work done = dot product of Force and displacement

Weight of object will be downward.

and motion is in horizontal direction.

According to newton's Second law motion

Moving with constant velocity in horizontal means no Net force in Horizontal direction.

Angle between direction of weight force and direction of motion = 90



\(Work= F*d \: cos\theta\)

\(Work= F*d \: cos90^{\circ}\)

Work = 0

Related Topics

wrote...
9 months ago
Thanks!
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  96 People Browsing
 164 Signed Up Today
Related Images
 685
 587
 75
Your Opinion
Which 'study break' activity do you find most distracting?
Votes: 289

Previous poll results: Do you believe in global warming?