Calculate Matt's Landing Speed on a Skateboard | Mass & Velocity Included"

  • Thread starter Thread starter guru
  • Start date Start date
  • Tags Tags
    Skateboard
AI Thread Summary
Matt is gliding on his skateboard at 4.00 m/s before jumping backward, propelling the skateboard forward at 8.00 m/s. The initial momentum is calculated as the combined mass of Matt and the skateboard multiplied by their initial speed. The final momentum equation considers Matt's speed as he lands and the skateboard's speed after the jump. After solving the equations, the final speed of Matt as he hits the ground is determined to be 3.44 m/s. The calculations highlight the conservation of momentum principle in this scenario.
guru
Messages
38
Reaction score
0
Matt is gliding on his skateboard at 4.00 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.00 m/s. Matt's mass is 50 kg and the skateboard's mass is 7 kg. How fast is Matt going as his feet hit the ground?

This what I did:
P_f = P_i

v_f(50kg + 7kg) = 50kg*4m/s + 7kg*4m/s
v_f = 4.49m/s ?
 
Physics news on Phys.org
Hmmm, not sure what you did.
The initial momentum you calculated looks correct: (50+7)*4. But the total final momentum is Vf*50+7*8, where vf is the speed of Matt. Solving for Vf, I get 3.44 m/s. I'm probably wrong though.
 
Thread 'Question about pressure of a liquid'

Thread 'Question about pressure of a liquid'

I am looking at pressure in liquids and I am testing my idea. The vertical tube is 100m, the contraption is filled with water. The vertical tube is very thin(maybe 1mm^2 cross section). The area of the base is ~100m^2. Will he top half be launched in the air if suddenly it cracked?- assuming its light enough. I want to test my idea that if I had a thin long ruber tube that I lifted up, then the pressure at "red lines" will be high and that the $force = pressure * area$ would be massive...
View full post »

Thread 'Why is the 3 body problem unsolvable? And what will happen if someone solves it?'

I feel it should be solvable we just need to find a perfect pattern, and there will be a general pattern since the forces acting are based on a single function, so..... you can't actually say it is unsolvable right? Cause imaging 3 bodies actually existed somwhere in this universe then nature isn't gonna wait till we predict it! And yea I have checked in many places that tiny changes cause large changes so it becomes chaos........ but still I just can't accept that it is impossible to solve...
View full post »

Similar threads

High School Physics Question -- Skateboarder Jumps & Conservation of Momentum
Replies
3
Views
2K
Calculating Velocity after Skateboard Jump - A Physics Problem
Replies
1
Views
3K
At what velocity does the skateboard shoot off?
Replies
2
Views
2K
Matt's Momentum After Jumping from Skateboard
Replies
2
Views
3K
Solve Momentum Problem for Dan on Skateboard
Replies
1
Views
3K
Find the mass of the skateboard
Replies
2
Views
4K
Calculating final speed using momentum
Replies
1
Views
8K
How would I use momentum to calculate projectile range?
Replies
5
Views
2K
How Do You Calculate Hickey's Mass from His Skateboarding Speed Change?
Replies
1
Views
2K
Collision of cballs of clay help
Replies
9
Views
5K

Hot Threads

Recent Insights

Back
Top