Revision on physics No. 3

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You will learn

to develope technical and digital competences,
to develope learning skills,
to check knowledge with physics,
to communicate in English.

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Nagranie dostępne na portalu epodreczniki.pl

nagranie abstraktu

Before the test get acquainted with time management during the test:

Eliminating wrong answers.
Substituting data - a reversed method of finding solution.
Estimating data.
Finding the solution and indicating the correct answer.

Interesting questions of a secondary school student - Basia discovers the laws of nature.

Read the text below and solve tasks 1 - 3.

Basia noticed two cars going in the same direction. During the overtaking manoeuvre, first the car approached the large lorry (TIR) at 80 m in 8 seconds. After some time, the car moved away from the lorry. Basia claims that the speed of the lorry was two times lower than the speed of a passenger car during the overtaking manoeuvre.

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Exercise 1

Therefore the lorry moved at the speed of

10 $\frac{m}{s}$
5 $\frac{m}{s}$
15 $\frac{m}{s}$
20 $\frac{m}{s}$

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Exercise 2

During the overtaking manoeuvre, the lorry covered the distance of 30 m. If the length of the passenger car was 6 m, the length of the lorry would be

24 m
16 m
20 m
30 m

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Exercise 3

If both cars moved at 18 $\frac{k m}{h}$ higher speed, then overtaking of the lorry would last

Read the text below and solve tasks 4 - 6.

Basia observed an attempt of the acceleration of a motorcycle which accelerated from 0 to 108 $\frac{k m}{h}$ in 6 seconds. The motorcycle was 150 kg.

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Exercise 4

The acceleration with which the motorcycle moves is

5 $\frac{m}{s^{2}}$
5 $\frac{m}{s}$
36 $\frac{m}{s}$
36 $\frac{m}{s^{2}}$

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Exercise 5

The minimum work that the engine of the motorcycle must do is

67 500 J
150 000 J
108 000 J
675 000 J

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Exercise 6

The distance that the motorcycle covered while attempting to accelerate was

120 m
60 m
90 m
135 m

Read the text below and solve tasks 7 - 9.

Basia observes a plane flying at the height of 2 km with such a speed relative to the speed of Earth that its kinetic energy is equal to its potential energy.

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Exercise 7

The airplane moves at a speed of

720 $\frac{k m}{h}$
72 $\frac{k m}{h}$
40 $\frac{m}{s}$
400 $\frac{m}{s}$

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Exercise 8

The aircraft's energy is 80 MJ. The weight of the plane is therefore

2000 kg
1000 kg
4000 kg
8000 kg

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Exercise 9

Let’s assume that the mass of the aircraft is the same as in Exercise 8. To double the height of the plane, but to keep the speed, the aircraft’s engines must therefore do the work of

40 MJ
20 MJ
80 MJ
120 MJ

Read the text below and solve tasks 10 - 12.

While observing the plane (see Exercise 7) Basia noticed that at some point a parachuter jumped out of it. At first he was moving with an acceleration of 5 $\frac{m}{s^{2}}$ . After 10 seconds, his parachute opened. As a result, the vertical velocity of the parachute falling very quickly reached the value of 4 $\frac{m}{s}$ . The parachuter weighed 100 kg.

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Exercise 10

The parachute therefore opened at a height of

1750 m
1600 m
1650 m
1700 m

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Exercise 11

During the vertical descent with the constant speed, the resistance force that acted on the parachuter was equal to

1000 N
100 N
400 N
2000 N

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Exercise 12

During the opening of the parachute, the air resistance force did the work of

744.2 kJ
74200 J
74.2 J
744.24 J

Read the text below and solve tasks 13 - 15.

Basia was very happy watching the plane (see previous tasks). With joy, she decided to throw a small apple in the sky. She wanted the pilot to grab it and eat it. The apple left Basia's hand at the height of 1 m.

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Exercise 13

Oh, Basia! Don’t you know that if you want the pilot to catch your apple, you would have to throw it vertically in the sky at the speed of (choose the answer below). Oh! I do not think you can do it!

200 $\frac{m}{s}$
100 $\frac{m}{s}$
150 $\frac{m}{s}$
250 $\frac{m}{s}$

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Exercise 14

In fact, the apple was raised to the maximum height of 11 m. Basia threw the apple at the speed of about

14.14 $\frac{m}{s}$
4.14 $\frac{m}{s}$
10 $\frac{m}{s}$
11 $\frac{m}{s}$

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Exercise 15

Unhappy Basia caught her apple back at the height of 1 m after about a time of (choose the answer below) after she had thrown it in the sky

2.82 s
4 s
1.41 s
5 s

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Exercise 16

You did your job well, so now have fun!

It can be kinetic or potential.
A unit of temperature measurement.
Meaning "rate of doing work".
The second is its unit in the International System of Units (SI).
It is the quantity of three-dimensional space enclosed by a closed surface.
It is a measure of distance.

1
2
3
4
5
6

Language Exercises

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Exercise 17

Indicate which pairs of expressions or words are translated correctly.

przyspieszenie - acceleration
siła oporu - resistance force
praca - work
odległość - distance
energia - kinetic energy
energia kinetyczna - potential energy

zadanie