What is the bicycle speed after the throw?

  • Thread starter Thread starter sensesfail
  • Start date Start date
  • Tags Tags
    Bicycle Speed
AI Thread Summary
The discussion centers on calculating the bicycle speed after Tony throws his pack forward. The initial momentum of the system is 330 kg*m/s, which remains constant after the throw. The velocity of the pack relative to the ground is 6 m/s, combining the bicycle's speed and the pack's throw speed. The final momentum equation leads to the conclusion that the bicycle's speed after the throw is approximately 5.41 m/s. The problem is resolved successfully, confirming the calculations.
sensesfail
Messages
8
Reaction score
0

Homework Statement



Tony of mass 55kg coasts on his bi cycle of mass 5 kg at a constant speed of 5m/s carrying a 6kg pack. tony throws his pack forward, in the direction of his motion, at 1 m/s relative to the speed of bicycle just before the throw.

Initial momentum of system (tony, bicycle, pack) is 330 kg* m/s
Momentum of system after pack is thrown is 330 kg*m/s

What is the bicycle speed after the throw? Answer in kg*m/s

Homework Equations





The Attempt at a Solution



330 / 5 = 66 kg*m/s

or 330 / 61 = 5.41 kg*m/s
 
Last edited by a moderator:
Physics news on Phys.org
Momentum of system after pack is thrown is 330 kg*m/s = (Mass of tony + Cycle)*v + Mass of the pack*its velocity. Velocity of pack with respect to the ground is 5 + 1 = 6m/s.
 
Thanks i got the answer!
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

How to Calculate Speed of Head of Driver After Collision?
Replies
10
Views
2K
Frame of reference of bicycle rider
Replies
2
Views
1K
What Is the Initial Momentum of the System?
Replies
3
Views
4K
Applying a force in a wheel bicycle
Replies
2
Views
1K
What is the energy conservation principle in a two masses and pulley problem?
Replies
33
Views
4K
Maximizing Cyclist Speed: Solving the Energy Question in a Race
Replies
11
Views
5K
Bicycle Forces in Circular Motion
Replies
1
Views
2K
What are the speeds of P and M while riding Ents and playing catch with rings?
Replies
18
Views
2K
Rotational Momentum: Calculating Angular Speed After Cockroach Stops
Replies
2
Views
2K
Ambiguous question on momentum and how it works...
Replies
13
Views
1K

Hot Threads

Recent Insights

Back
Top