Tasks for the “language” of physics 1. The figure shows a graph of the coordinates of a body moving along the OX axis versus time. Compare the velocities v1 , v2 and v3 of the body at times t1, t2 , t3 . 1) 2) 3) 4) v1 v1 v1 v1 > v2 > v2< v2 = v2 X = v3 >v3< v3 >v3 2. Uniformly accelerated motion corresponds to 0, the graph of the dependence of the acceleration module on time, indicated in the figure by the letter at1 t2 Аt3 B t C D 0 1) A 2) B 3) C 3. The figure shows a graph of the dependence of the spring elasticity force on the magnitude of its deformation. The stiffness of this spring is 1) 2) 3) 4) 4) Г t Fcontrol, N 20 10 N/m 20 N/m 100 N/m 0.01 N/m 10 0 0.05 0.1 0.15 0 ,2 х, m 4. The car moves along a straight street. The graph shows the dependence of the speed of the car on time. The acceleration module is maximum on the time interval vх, m/s 20 10 0 1) 2) 3) 4) 10 20 30 40 t, s from 0 s to 10 s from 10 s to 20 s from 20 s to 30 s from 30 s up to 40 s 5. To measure the stiffness of the spring, the student assembled the installation (see Fig. 1), and suspended a load of 0.1 kg from the spring (see Fig. 2). What is the stiffness of the spring? Fig.1 1) 40 N/m 2 2) 20 N/m 6. The graph shows the dependence of the temperature T of the substance on time t. AT initial moment time the substance was in crystalline state . Which of the points corresponds to the end of the curing process? 3) 13 N/m 4) 0.05 N/m Т 4 2 3 5 1 6 7 t 1) 5 2) 6 3) 3 4) 7 1) 2) 3) 4) 7. gives 1 kg of the substance under study when cooled to a particular temperature. The measurement results are indicated in the figure by dots. What is the specific heat capacity of this substance? 1) 2) 3) 4) Q, kJ 40 30 20 1.5 kJ/(kgK) 1.25 kJ/(kgK) 1.0 kJ/(kgK) 0.75 kJ/( kgK) 10 0 60 8. The dependence of the boiling time of a certain amount of water on the power of the boiler was experimentally investigated. Based on the measurement results, a graph is constructed, shown in the figure. What conclusion can be drawn from the results of the experiment? 50 t,C 40 t, s The heating time is directly proportional to the heater power. As the power of the heater increases, the water heats up faster. The power of the heater decreases over time. The heat capacity of water is 4200 J/(kgС). 40 20 0 2 4 9. When studying the dependence of the sliding friction force Ffr on the force of normal pressure Fd, the following data were obtained: Ftr, N 0.2 0.4 0.6 Fd, N 1.0 2.0 3.0 From the results research, we can conclude that the coefficient of sliding friction is: 1) 0.2 2) 2 3) 0.5 4) 5 10. Four bodies moved along the Ox axis. The table shows the dependence of their coordinates on time. t, s 0 1 2 3 4 5 x1, m 0 2 4 6 8 10 x2, m 0 0 0 0 0 0 x3, m 0 1 4 9 16 25 x4, m 0 2 0 –2 0 2 could the speed be constant and different from zero? 1) 1 2) 2 3) 3 4) 4 11. Which graph correctly reflects the dependence of the moment of force on the modulus of force, provided that the arm of force remains unchanged? 4) G (Formula of the moment of forces M = FL M-moment of force; F-force; L-shoulder of force) P, kW 12. Which graph correctly reflects the dependence of the force F of the interaction of two point charges on the square of the distance between them? Force calculation formula: F=k q1q 2 R2 13. The figure shows a graph of the car speed modulus versus time in an inertial frame of reference. During what periods of time did the total force acting on the car from the side of other bodies equal to zero if the car moved in a straight line? 1) 2) 3) 4) v, m/s 0 – t1 , t3 – t4 0 – t4 t1 – t2, t2 – t3 there are no such time intervals 3 2 1 0 T t1 t2 t3 14. A certain amount of aluminum was placed in the furnace . A diagram of aluminum temperature changes over time is shown in the figure. The furnace at constant heating transfers to aluminum 1 kJ of energy per minute. How much heat was required to melt aluminum, already heated to its melting point? 0 5 10 1) 5 kJ 15 20 25 t, min 2) 15 kJ 3) 20 kJ 4) 30 kJ 15. The figure shows the dependence of the current strength in three conductors on the voltage at their ends. Which conductor has a resistance of 4 ohms? t4 t I, A of conductor 1 of conductor 2 of conductor 3 there is no graph for such a conductor 1) 2) 3) 4) 1 6 4 2 2 3 0 2 4 6 8 10 U, V 16. four moving bodies in a straight line. Which body is moving with the highest speed? 17. The figure shows a graph of the dependence of the modulus of the body's velocity on time for a rectilinearly moving body. The resultant of all forces acting on the body is equal to zero 1) AB CD 2) OA BC 3) BC 4) OA 18. Using the graph of the projection of the speed of the body movement versus time, determine the movement of the body during the first 10 seconds of movement. 1) 2) 3) 4) 12 m 21 m 30 m 33 m 19. Three bodies have the same volume and are immersed in different liquids (see figure) What is the ratio between the forces of Archimedes acting on these bodies? 1) 2) 3) 4) FA1< FА2< FА3 FА1= FА2= FА3 FА1< FА2>FA3 FA1> FA2< FА3 vx, м/с 4 2 0 1) вода 4 8 2) спирт t, с 3) ртуть 20. Через резистор идет D.C.. The figure shows a graph of the power dissipated in a resistor versus the current flowing through that resistor. What is the resistance of the resistor? 1) 20 Ohm 2) 40 Ohm 3) 80 Ohm 4) 160 Ohm Current power formulas: 2 P=IU P=I R U2 P= R 80 U 40 0 ​​21. It is necessary to check whether the thermal conductivity of a round metal rod depends on its area cross section. Which rods A 1 B 2 C D 1) A and B 2) A and D 3) B and D 4) A, C and D should be used for such a check? 22. The figures show graphs of the dependence of the acceleration module on the time of movement. Which of the graphs corresponds to uniform rectilinear motion? 1) a 2) a 0 t 3) a 0 23. The figure shows the sliding friction force versus the normal pressure force. What is the coefficient of friction? t 4) and 0 t 0 the graph depends on t 24. A homogeneous cube rests on one floor, the other on a vertical wall (see. The shoulder of the force of elasticity N2 is relatively equal to the edge in the figure). point B

Physics/Dynamics

1. The body moves in a straight line with constant speed. Which statement about the resultant of all forces applied to it is correct?

a) Not equal to zero and constant in magnitude and direction

b) Not equal to zero and constant only modulo

c) Equal to zero or constant in magnitude and direction

d) Equal to zero

2. The body moves under the action of a force constant in absolute value, which is directed in the direction of the body's movement. Choose the correct statement.

a) A body is moving in a straight line

b) The body is moving with uniform acceleration

c) The body is moving at the same speed

d) A body moves in a circle

3. The figure shows the direction of the velocity and acceleration vectors of the ball. The resultant of all forces applied to the ball is directed along the vector ...

4. The figure shows a graph of changes in body speed over time. In which section of motion is the sum of all forces acting on the body not equal to zero and directed to the side, opposite movement body?

a) in section 1

b) in section 2

c) in section 3

d) in all areas of traffic

5. Find the mass of the body to which the force of 20 N imparts an acceleration of 5 m / s 2.

6. Physical quantity, which determines what acceleration the body acquires under the influence of a certain influence.

b) inertia

c) inertia

7. The figure shows a graph of the dependence of the speed of the body on time. Which of the graphs shows the dependence of the resultant of all forces applied to this body on time?

8. What determines the action of force on the body?

a) From the modulus of force

b) From the modulus of force and its direction

c) From the modulus of force and the point of its application

d) From the modulus of force, its direction and point of application

9. A body weighing 2 kg moves with a speed of 3 m/s and an acceleration of 2 m/s 2 . What is the modulus of the resultant forces acting on the body?

Isothermal compression is a process:

7. An ideal gas was first heated at constant pressure, then its pressure increased at constant volume, then at constant temperature, the pressure of the gas decreased to its original value. Which of the charts coordinate axes p-T corresponds to these changes in the state of the gas?

8. The figure shows a cycle carried out with an ideal gas. Isobaric heating corresponds to the area:

9. The figure shows a graph of temperature dependence T substances from time t.

At the initial moment of time, the substance was in a crystalline state. Which of the points corresponds to the beginning of the melting process of the substance?

10. One of the confirmations of the position of the molecular-kinetic theory of the structure of matter that particles of matter move randomly, maybe serve:

A - the ability to evaporate liquid at any temperature

B - dependence of the pressure of the liquid column on the depth

B - expulsion from the liquid of bodies immersed in it

Which of the statements are correct?

1. Only B

2. Only A and B

3. Only B and C

4. Only A

11. When an ideal gas is heated, its absolute temperature doubles. How did the average change kinetic energy thermal motion gas molecules?

1. Increased 16 times

2. Increased 4 times

3. Increased 2 times

4. Hasn't changed

12. In a vessel of constant volume is ideal gas in the amount of 2 mol. How to change absolute temperature vessel with gas, so that when another 1 mole of gas is added to the vessel, the pressure of the gas on the walls of the vessel decreases by 2 times?

1. Zoom in 2 times

2. Reduce by 2 times

3. Zoom in 4 times

4. Reduce by 3 times