Английский язык. Ч. 1. Ильичева Н.А - 23 стр.

                                            23
          Ключи к учебно-методическому пособию (И-117). Часть I.

                                    Unit 1 – Motion

        1. a) The motion of objects – baseballs, automobiles, joggers and even the Sun
and Moon is an obvious part of everyday life.
           b) For example, you put your foot on the gas pedal of your car which is at
rest and start forward. The velocity of the car changes, which means that the car ac-
celerates. Another example is that of objects dropped near the surface of the Earth.
They will fall with the same acceleration.
        2. 1) position; 2) moving; 3) speed; 4) velocity; 5) acceleration; 6) downward;
7) constant.
        3. 1 – D; 2 – F; 3 – J; 4 – B; 5 – H; 6 – E; 7 – A; 8 – I; 9 – G; 10 – C.
        4. –
        5. 1 – G; 2 – F; 3 – D; 4 – H; 5 – C; 6 – B; 7 – E; 8 – A.
        6. 1) straight-line; 2) continuous; 3) scalar; 4) distinct; 5) average; 6) opposite;
7) total; 8) frictional; 9) centripetal; 10) basic.
        7. 1) average speed; 2) centripetal acceleration; 3) frictional effects; 4) con-
tinuous change; 5) straight-line; 6) scalar quantity; 7) distinct meaning; 8) basic dif-
ference; 9) opposite direction; 10) total distance.
        8. 1) rotates; 2) speed up; 3) the same; 4) downward; 5) changing; 6) size; 7)
increase your speed; 8) vector; 9) opposite.
        9. A 1) interchangeably; 2) changes; 3) interchangeable; 4) changeable; 5)
change.
           B 1) moving; 2) moves; 3) movement; 4) move; 5) move; 6) movement.
        10. Until the time of Galileo it was widely believed that heavier objects fall
faster than lighter objects and that speed of fall is proportional to how heavy the ob-
ject is. Galileo postulated that all objects would fall with the same constant accelera-
tion in the absence of air or other resistance. He showed that this postulate predicts
that for an object falling from rest, the distance traveled will be proportional to the
square of the time, that is d & t 2.
        11. –
        12. 1 – b; 2 – d; 3 – a; 4 - c.
        13. 1) divided, distance; 2) signify, moving, displacement; 3) change; 4) resis-
tance, gravity; 5) centre, centripetal.
        14. 1 – b; 2 – d; 3 – a; 4 – e; 5 – c.
        15. 1) turning around; 2) distance; 3) total; 4) displacement; 5) starting; 6) av-
erage; 7) magnitude.
        16. a) slow down; b) initial velocity; c) final velocity; d) change in velocity; e)
average acceleration, final velocity, initial velocity.
        17. a) speed; b) increase; c) brake; d) decelerate; e) application; f) stopping dis-
tance; g) multiply; h) calculate; i) conditions.
        18. 1 – d; 2 – f; 3 – g; 4 – c; 5 – a; 6 – e; 7 - b.
        19. 3. Matter exists in time, occupies space and has mass.
             4. The science of chemistry doesn’t deal with speed and velocity.
             5. Objects don’t fall downward with different acceleration.