What impulse is needed to change the speed of a 16 kg object

  • Thread starter Dil
  • Start date
  • #1
Dil
3
0
This question is infuriating me. It says the answer is 32, but I can't get that.
--------------------------------------------------------------------
What impulse is needed to change the speed of a 16 kg object from 14 m/s to 26 m/s in a time of 5s? How much force is needed?

mVf - mVi
(16)(26)-(16)(14) = 192

F(change in 5s)=192 192/5 = 38.4N
--------------------------------------------------------------------

What am I doing wrong?
 

Answers and Replies

  • #2
650
1
Impulse is a vector quantity and speed a scalar. Is the direction changing pls see it
 
  • #3
Dil
3
0
I don't think the direction is changing
 
  • #4
374
2
Perhaps the given answer is wrong... It sure looks wrong to me!
 
  • #5
650
1
Yes to me it 2 seems to be on wrong side
thats why i asked for direction
 
  • #6
NateTG
Science Advisor
Homework Helper
2,450
6
You sure it's not 16 to 26 m/s or 14 to 24 m/s?
 

Related Threads on What impulse is needed to change the speed of a 16 kg object

Top