Question

Problem 7.26 A 0.250-kg ice puck, moving east with a speed of 5.62 m/s , has...

Problem 7.26 A 0.250-kg ice puck, moving east with a speed of 5.62 m/s , has a head-on collision with a 0.900-kg puck initially at rest. Assume that the collision is perfectly elastic.

Part A What is the speed of the 0.250-kg puck after the collision?

Express your answer to three significant figures and include the appropriate units.

v1 =

Part B What is the direction of the velocity of the 0.250-kg puck after the collision? What is the direction of the velocity of the 0.250- puck after the collision?

a) to the east

b) to the west

Part C What ise the speed of the 0.900-kg puck after the collision?

Express your answer to three significant figures and include the appropriate units.

v2 =

Part D What is the direction of the velocity of the 0.900-kg puck after the collision? What is the direction of the velocity of the 0.900- puck after the collision?

a) to the east

b) to the west

Homework Answers

Answer #1

a)

m1 = 0.250 kg

v1i = 5.62 m/s

v1f = ?

m2 = 0.900 kg

v2i = 0 m/s

v2f = ?

using conservation of momentum

m1 v1i + m2 v2i = m1 v1f + m2 v2f

(0.250) (5.62) + (0.900) (0) = (0.25) v1f + (0.9) V2f

V2f = (1.41 - (0.25) v1f ) /0.9                                 eq-1

usingh conservation of kinetic energy

m1 v21i + m2 v22i = m1 v21f + m2 v22f

using eq-1

(0.250) (5.62)2 + (0.900) (0)2 = (0.25) v21f + (0.9) ((1.41 - (0.25) v1f ) /0.9)2

v1f = - 3.62 m/s

direction = west     since v1f is negative so opposite to east

using eq-1

V2f = (1.41 - (0.25) v1f ) /0.9 = (1.41 - (0.25) (-3.62)) /0.9 = 2.6 m/s   towards east   since v2f is positive

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A 0.450-kg ice puck, moving east with a speed of 5.46 m/s , has a head-on...
A 0.450-kg ice puck, moving east with a speed of 5.46 m/s , has a head-on collision with a 0.990-kg puck initially at rest. Assume that the collision is perfectly elastic. Part A What is the speed of the 0.450-kg puck after the collision? Express your answer to three significant figures and include the appropriate units. Part B What is the direction of the velocity of the 0.450-kg puck after the collision? Part C What is the speed of the...
A 0.250-kg ice puck, moving east with a speed of 5.58 m/s, has a head-on collision...
A 0.250-kg ice puck, moving east with a speed of 5.58 m/s, has a head-on collision with a 0.900-kg puck initially at rest. Assume that the collision is perfectly elastic. a. What is the speed of the 0.250-kg puck after the collision? b. What is the direction of the velocity of the 0.250-kg puck after the collision? c. What is the direction of the velocity of the 0.250-kg puck after the collision? d. What is the direction of the velocity...
A 0.250-kg ice puck, moving east with a speed of 5.48 m/s, has a head-on collision...
A 0.250-kg ice puck, moving east with a speed of 5.48 m/s, has a head-on collision with a 0.900-kg puck initially at rest. Assume that the collision is perfectly elastic. What is the speed of the 0.900-kg puck after the collision?
A 0.250-kg ice puck, moving east with a speed of 5.26 m/s , has a head-on...
A 0.250-kg ice puck, moving east with a speed of 5.26 m/s , has a head-on collision with a 0.950-kg puck initially at rest. Assume that the collision is perfectly elastic. part A What is the speed of the 0.250-kgkg puck after the collision? part B What is the speed of the 0.950-kgkg puck after the collision?
A ball of mass 0.458 kg moving east (+x direction) with a speed of 3.76 m/s...
A ball of mass 0.458 kg moving east (+x direction) with a speed of 3.76 m/s collides head-on with a 0.229 kg ball at rest. Assume that the collision is perfectly elastic. 1.What is be the speed of the 0.458-kg ball after the collision? Express your answer to three significant figures and include the appropriate units. 2.What is be the direction of the velocity of the 0.458-kg ball after the collision?. 3.What is the speed of the 0.229-kg ball after...
A 0.495-kg hockey puck, moving east with a speed of 4.20 m/s , has a head-on...
A 0.495-kg hockey puck, moving east with a speed of 4.20 m/s , has a head-on collision with a 0.850-kg puck initially at rest. a) Assuming a perfectly elastic collision, what will be the speed (magnitude of the velocity) of each object after the collision?
A 0.450-kg ice puck, moving east with a speed of 5.14 m/sm/s , has a head-on...
A 0.450-kg ice puck, moving east with a speed of 5.14 m/sm/s , has a head-on collision with a 0.990-kg puck initially at rest. Assume that the collision is perfectly elastic. What is the speed of the 0.450-kg puck after the collision? Can I please get some help for this question
A puck of mass 5 kg moving at 2 m/s approaches an identical puck that is...
A puck of mass 5 kg moving at 2 m/s approaches an identical puck that is stationary on frictionless ice. After the collision, the first puck leaves with speed v1 at 30° to the original line of motion, the second puck leaves with speed v2 at -60°. (a) Calculate v1 and v2 Please show all formulas and calculations please.
A 3.20-kg object is moving east at 4.50 m/s when it collides with a 6.00-kg object...
A 3.20-kg object is moving east at 4.50 m/s when it collides with a 6.00-kg object that is initially at rest. After the completely elastic collision, the larger object moves east at 3.13 m/s. 1) What is the final velocity of the smaller object after the collision? Assume that the positive direction is to the east.(Express your answer to three significant figures.)
On a frictionless, horizontal air table, puck A (with mass 0.250 kg ) is moving toward...
On a frictionless, horizontal air table, puck A (with mass 0.250 kg ) is moving toward puck B (with mass 0.400 kg ) A -After the collision, puck A has a velocity of 0.150 m/s to the left, and puck B has velocity 0.750 m/s to the right. What was the speed of puck A before the collision? B- If the two pucks collide and stick together with a final velocity of 0.6000 m/s to the right, what was the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT