III. Перепишите следующие предложения, подчеркните в каждом из них модальный глагол или его эквивалент. Переведите предложения.

1. They were to give the results of their experimental work as soon as possible.

2. Your investigation must attract attention of all the scientists.

3. Motion may be defined as continuous change of position.

4. A number of substances can absorb considerable amount of gases.

IV. Прочитайте и устно переведите с 1-го по 5-й абзацы текста. Перепишите и письменно переведите 1, 2 и 4 абзацы.

MOTION

1. Never before motion has been so important as it is today. In our everyday life we have observed many cases when bodies act upon each other. When it is acted upon some force a body begins to move, stops or changes the direction of its motion. However in some cases a body is acted upon by some other body but its state does not change. Then we say that the body is in equilibrium.

2. Motion may be defined as a continuous change in place or position with respect to the position of some other object or objects if they are at rest. Because no object is really quite motionless.

If houses are at rest relative to the earth's surface, the earth itself is not motionless. It revolves about its axis and around the sun; the sun, in its turn, moves relative the stars which are also in a state of motion.

A man sitting in a tram may seem motionless to his passengers. In reality all are moving rapidly with respect to any man in the street.

3. The motion of bodies may be divided into three сlasses: 1) translation; 2) rotation; 3) vibration or oscillation. A body has a motion of translation when it moves continuously in the same direction. If a body instead of travelling forward turns on a fixed axis, it has a motion of rotation. The drive wheels of locomotive are moving forward and are at the same time rotating. Therefore they have two motions, one of rotation and the other of translation. Some bodies reverse their motions from time to time and return at regular intervals to their original positions. Such bodies have a motion of vibration or oscillation.

4. Whenever any movement occurs at a constant speed the forces

which tend to cause it are balanced by other forces which tend to stop it. If the forces cause motion they are greater than the forces that oppose it. Thus, every body continues to remain in its state of rest or uniform motion unless it is acted upon some force. Any change of the direction of motion requires a force just a change of speed does.

5. When we speak of movement and speed it is necessary to mention the Unit of Speed in the metre - kllogram - second (MKS) system and in the old English system of units. The Unit of Speed in the MKS system is one metre per second (m/s). The corresponding unit in the English system of units is one foot per second (ft/s).

Вариант №2

I. Перепишите и переведите следующие предложения, подчеркните в каждом из них глагол-сказуемое и определите его видо-временную форму и залог. В разделе (б) обратите внимание на перевод пассивных конструкций.

a)

1. Today scientists are still looking for the substance as a source of energy.

2. The direction of motion has changed but the body continues its motion.

3. The development of physics resulted in the appearance of today's cinema, television, radio and so on.

4. These forces will cause the motion of a body.

б)

1. Heat energy is transmitted in two different ways.

2. The discovery of electron was followed by the investigation of its properties.

II. Перепишите и переведите следующие предложения, подчеркните Participle I и Participle II и установите функции каждого из них, то есть укажите, является ли оно определением, обстоятельством или частью глагола-сказуемого.

1. The forces of two bodies acting on one another are always equal in magnitude and opposite in direction.

2. The plant equipped with modern machinery overfulfilled its plan last month.

3. When placed in a vessel a gas fills it completely.

4. A computer solving a lot of problems was designed by a group of students.