Cube Deceleration Problem

  • Thread starter caseys
  • Start date
  • #1
14
0
A 0.5m cube is sitting on top, and at the end, of a 1m wide by 3m long board. Both the cube and board are traveling at a constant velocity of 10 m/s. The board begins to decelerate at -8.5 m/s squared. The cube decelerates across the top of the board at -3 m/s squared. How much time will it take for the cube to move 1.5 meters across the top of the board.

I can figure the problem out if the board was not moving but am stuck in trying to figure out how the board decelerating faster will affect the deceleration of the cube.
 

Answers and Replies

  • #2
HallsofIvy
Science Advisor
Homework Helper
41,847
966
If the board is decelerating at -8.5 m/s2 and and the box is decelerating at -3 m/s2, then, relative to the board[\b], the box is accelerating at -3- (-8.5)= 5.5 m/s2. Now just do it as if the board were not moving.
 
  • #3
14
0
Got it! Thanks...
Casey
 

Related Threads on Cube Deceleration Problem

  • Last Post
Replies
2
Views
4K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
1
Views
8K
  • Last Post
Replies
3
Views
2K
Replies
1
Views
6K
  • Last Post
Replies
5
Views
4K
Replies
6
Views
3K
Top