Шар движется под углом к поверхности стены, и упруго столкнувшись с ней, отскакивает. Определить направление изменения импульса шара

1. Ann’s hair was dirty. Now it’s clean. (wash)

Ann has washed her hair.

2. Tom was 80 kg. Now he’s 70.

 Tom has lost weight.  

3. Bill played football yesterday. Now he can’t walk; his leg is in plaster.

Bill has broken his leg.

4. My sister is looking for her pen.

 My sister has lost her pen.

5. Mary is on holiday in France.

 Mary has gone on holiday to France.  

6. Mr. Hill was in Canada last week. He’s back in London now.

  Mr. Hill has been to Canada.

7. Look! Mrs. Smith has got a lot of packages.

  Mrs. Smith has bought a lot of things.

8. I can’t eat anything now.

  I have eaten too much .

9. Mrs. Jenkins is very tired.

  Mrs. Jenkins has cleaned the house.

10. Tony needs a holiday.

 Tony has worked hard this year.