Calculating Impulse & Kinetic Energy of Collision

AI Thread Summary
The discussion focuses on a physics problem involving a collision between a moving plastic cube and a stationary ball on a frictionless table. Key calculations include determining the total impulse imparted to the ball, its horizontal velocity post-collision, and the speed and direction of the cube after the impact. Additionally, the kinetic energy lost during the collision and the distance between the impact points of both objects on the floor are to be calculated. Participants are encouraged to share their attempts and identify where they need assistance to facilitate effective problem-solving. The thread emphasizes collaborative learning in physics.
dbb2112
Messages
39
Reaction score
0
A 5 kilogram ball initally rests at the edge of a 2 meter long, 1.2 meter high frictionless table. A hard plastic cube of mass .5 slides across the table at a speed of 26 meters per second and strikes the ball, causing the ball to leave the table in the direction in which the cube was moving.

a. Determine the total impulse given to the ball.
b.Determine the horizantal velocity of the ball immediately after the collission.
c.Determine the following for the cuble immediatley after the collision.
i. its speed
i. its direction of travel if moving
d determine the kinetic energ dissipated in the collision
e. determine the distance beween the two points of impact of the objects with the floor
 
Physics news on Phys.org
Welcome to PF!

Hi dbb2112! Welcome to PF! :smile:

Show us what you've tried, and where you're stuck, and then we'll know how to help. :wink:
 
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...
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...
Back
Top