Which block falls off the table first? - Elastic collision

AI Thread Summary
In the discussion, a 2kg block on a frictionless table is struck by a 1kg block traveling at 4 m/s in an elastic collision scenario. The problem involves calculating the velocities of both blocks post-collision to determine which will fall off the table first. The user has successfully calculated the initial momentum but struggles with finding the final velocities. Key equations mentioned include momentum (p=mv) and kinetic energy (1/2mv^2), which are essential for solving the problem. The focus remains on understanding the outcomes of the elastic collision to predict the movement of the blocks.
garretts16
Messages
9
Reaction score
0

Homework Statement



A 2kg block is resting on a frictionless table. It is hit, head on, by a 1kg block heading at 4 m/s. The larger block is sitting 3m from the edge of a 5m long table. The collision happens with the smaller block's distance being 2m from the table and the larger blocks d = 3m from edge. Which block will fall off the table first? It's an elastic collision.

Homework Equations



I used p=mv and 1/2mv^2

The Attempt at a Solution



I was able to fine the momentum before, but I can't solve for the velocities.
 
Physics news on Phys.org
Show your work.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Egg Drop Challenge! Need ideas for winning designs'

I was thinking using 2 purple mattress samples, and taping them together, I do want other ideas though, the main guidelines are; Must have a volume LESS than 1600 cubic centimeters, and CAN'T exceed 25 cm in ANY direction. Must be LESS than 1 kg. NO parachutes. NO glue or Tape can touch the egg. MUST be able to take egg out in less than 1 minute. Grade A large eggs will be used.
View full post »

Similar threads

Why is momentum conservation always true in a collision?
Replies
4
Views
2K
Collision and Momentum of Blocks
Replies
1
Views
1K
Elastic collision between ball and block
2
Replies
63
Views
9K
Which block will strike first? Left or right?
Replies
3
Views
1K
Find the height the block rises to after an elastic collision
Replies
7
Views
5K
How Fast is the Ball After a Perfectly Elastic Collision?
Replies
1
Views
1K
What is the effect of an elastic collision between two blocks and a chain?
Replies
3
Views
2K
Momentum: why don't the two carts become one?
Replies
32
Views
1K
How do I solve for an elastic collision going up a ramp?
Replies
10
Views
3K
What Are the Velocities of Two Blocks After an Elastic Collision?
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top