موضوع مناقشة واجبات فيزياء 101 ترم 111 ‏

طيب يا أخ l-e-n-o ممكن تقول كم أخذت في الواجب ؟

 

A 72 kg man lying on a surface of negligible friction shoves a stone away from himself, giving it a speed of 6.7 m/s. If the speed of the man after the shove is 0.006 m/s in the backward direction then what is the mass of the stone?

Answer in SI units and upto 3 decimal places. Do not write units with your answer.


الله لا يهينكم يا شباب كيف احل هدا؟

 

^
+1

 

الواجب الجديد Ch09-Lec04

A very light object traveling at 10m/s along +x-axis strikes a much heavier object, initially at rest. If the collision is elastic, the speed of the lighter object is:



1. -10i

2. 10i

3. Can't tell from the information given

4. -20i

5. 20i

اتوقع -10i
----------------------

A 6.95-g bullet traveling horizontally at 435m/s hits a 4.51-kg wooden block, which is initially at rest on a smooth horizontal table. The bullet buries itself in the block without passing through. What is the speed of the block after the collision?

---------------------

Sphere A has mass 2.2Kg and is moving with velocity 8.6 m/s along the +x-axis. It makes a head-on elastic collision with a stationary sphere B of mass 7.2Kg. What is the speed of sphere A after the collision?





طول شابتر 9

 

A 2-kg rubber ball is dropped from the window of a building. It strikes the sidewalk below at 10m/s and rebounds up at 10m/s. What is the impulse of the ball? (Take y-axis positive upwards)

1. -40j
2. -20j
3. 0
4. 40j
5. 20j

هذا وش جوابه يَ شباب ؟

 

حل الواجبCh09-Lec03

p=2mv q1
m =mass
v=velocity



q2

m(stone=m(man)*vf(man)/vf(stone)


q3
vf(cart)=(m(man)*vi(man)+m(cart)vi(cart))/m(cart
مافي اوضح من كذا

 

1. 111-Q1-Ch09-Lec03
(Points: 1)




A 2-kg rubber ball is dropped from the window of a building. It strikes the sidewalk below at 10m/s and rebounds up at 10m/s. What is the impulse of the ball? (Take y-axis positive upwards)



1. -20j

2. 40j

3. 20j

4. -40j

5. 0







Save Answer








2. 111-Q2-Ch09-Lec03
(Points: 1)




A 89 kg man lying on a surface of negligible friction shoves a stone away from himself, giving it a speed of 5.2 m/s. If the speed of the man after the shove is 0.004 m/s in the backward direction then what is the mass of the stone?
Answer in SI units and upto 3 decimal places. Do not write units with your answer.


Answer






Save Answer








3. 111-Q3-Ch09-Lec03
(Points: 1)




72-kg man is riding in a 64-kg cart at 2.7m/s. He jumps off the cart in such a way as to land on the ground with no horizontal velocity. What is the resulting change in the speed of the cart?
Answer in SI units and upto 1 decimal place. Do not write units with your answer.

ليت طريقة الحل يشباب تكفون؟

 

الحين في السؤال الأول ال v كم تساوي وفي السؤال الثانيVF STONE كم يساوي والسؤال الثالث VI لل MAN و CART كم يساوو وأسفين على كثرة الأسئلة
الرجاء الرد

 

شباب وينكم يعني محد ناوي يساعد

 

1\3

 

ياشباب هذاك ماعطينا الجواب ليس صحيح الرجاء التأكددددددد انا جايب 1/3

 

الرجاااااااااااااااااااااااااااااااااء التأكد ما لك داع تعطيناغلط الرجاء المحاسبه انا ارسلت بناءا خوينا

 

ابو خليف تكفى عززززززززززززززززززززززززززززززززززززززززززززززززززز

 

يا شباب

في الأخيرة يبي ال change

ولا final velocity

 

Not released




WHAT IS UP

 

Ch09-Lec03
Grade -/3 The grade displayed is the First of your attempts.
Attempt Status Score
Attempt 1 Graded Not released

 

واضح ؟؟؟؟؟؟

 

السؤال الثالث يبغى الـchange
change in v = vf-vi

 

صح كلامكـــ سليم