Revision on physics No. 4

RyL61FbBBVpMt

You will learn

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

RrfAeOL6XmKDj1

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.

One day Basia and her parents were watching the dam. Basia was extremely impressed with the water falling from the height of 20 m. Over 600 tons of water flows through the dam every minute, which increases its speed from zero to a certain maximum value. The surface of the dam is 2000 mIndeks górny 2.

RxIyZf7cE2PFY

Exercise 1

The falling water hits the surface of the water tank with the speed of

20 $\frac{m}{s}$
10 $\frac{m}{s}$
30 $\frac{m}{s}$
40 $\frac{m}{s}$

Rueq5Ahy9jndC

Exercise 2

Water exerts pressure force on the vertical wall of the dam

200 MN
100 MN
300 MN
400 MN

RvdXmiWzLRT1F

Exercise 3

If you used the energy of the falling water to power a hydroelectric power plant, the maximum power of such a power plant would be

2 MW
1 MW
10 MW
20 MW

Read the text below and solve tasks 4 - 6.

Basia was riding her bicycle uphill. During the ride, an effective friction equal to 20% of the body weight worked on her. The smart Basia decided to accelerate to the speed of 36 $\frac{k m}{h}$ and stopped pedalling.

RyGYSCyJJGjUi

Exercise 4

Basia rode uphill with an absolute acceleration of

2 $\frac{m}{s^{2}}$
1 $\frac{m}{s^{2}}$
3 $\frac{m}{s^{2}}$
4 $\frac{m}{s^{2}}$

ReywThPfeyodx

Exercise 5

Basia stopped after (choose the answer below) since the moment she had stopped pedaling

R14UZGukm7wc2

Exercise 6

Basia rode the distance of (choose the answer below) until she stopped

25 m
20 m
30 m
40 m

Read the text below and solve tasks 7 - 9.

Basia threw the ball horizontally with the initial speed of 10 $\frac{m}{s}$ . The ball fell to the ground after 0.6 seconds. The horizontal motion can be treated as the composition of two independent motions: a free fall in the vertical direction and steady motion in the horizontal direction.

R18d6GNgk2z0p

Exercise 7

Basia analysed the free fall and she realised quickly that the initial height of the ball from which it was thrown was

180 cm
90 cm
150 cm
210 cm

RwkSFQ2XKepTb

Exercise 8

Analysing the horizontal movement, Basia easily found out that the ball fell in the distance of (choose the answer below) from her (taking the disance of the surface of the Earth into consideration)

R1FzijWOvFte3

Exercise 9

It took Basia just a short moment to make correct calculations that the ball hit the ground with a speed of about

11.66 $\frac{m}{s}$
5 $\frac{m}{s}$
9 $\frac{m}{s}$
14.14 $\frac{m}{s}$

Read the text below and solve tasks 10 - 12.

Basia decided to prepare a water bath for her dog Miętus. First, she poured 40 liters of water at 60°C temperature into the bathtub. However, she stated that the water temperature was too high.

RWZw0msr1D4FS

Exercise 10

To prepare a bath for Miętus with the temperature of 40°C, she needs to pour (choose the answer below) litres of water at only 10°C temperature into the bathtub.

26.7
21.8
15.8
32.8

R1AesNBODI6RX

Exercise 11

The dog is 20 kg. After Miętus fully submerged into the water, his weight decreased by 80%. Let’s assume that one litre of water has a mass of 1kg. The dog’s volume is

0.016 $m^{3}$
1.6 $m^{3}$
0.16 $m^{3}$
0.0016 $m^{3}$

RcuaxVSdeA7ws

Exercise 12

The buoyant force acting on Miętus had a value of

160 N
16 N
16 kN
200 N

Read the text below and solve tasks 13 - 15.

Basia really dislikes solving the text problems with electric current. Basia! It's very simple! Look!

R1XOVp9jddjMV

Exercise 13

The resistance of a copper wire is $1 Ω$ . The resistance of copper wire made of the same mass of copper, but twice as long, is of course

$4 Ω$
$1 Ω$
$2 Ω$
$3 Ω$

RVz9pwYcANZ1v

Exercise 14

Two bulbs adapted for 230 V with 100 W and 200 W power were connected in series circuit to 230 V. Is it true that the power of the circuit exceeds 50 W?

Yes
No
There is no data to determine the separate power.
Yes or No, depending on the type of bulbs used.

R16fNLl0Xb68G

Exercise 15

Three bulbs A, B, C were connected into a parallel circuit and supplied with rated voltage. The highest power was then released on the C bulb and the lowest on the A bulb. Then the bulbs were connected in series with each other and the rated voltage was again connected to them. On which bulb will the greatest power be released then?

A
B
C
The same power is released on each bulb.

Rvmy36nE1s5Wj

R1eZY3PMVOJ3e

Exercise 16

You did your job well, so now have fun!

electric current	kilogramme	[kg]
time	ampere	[A]
mass	metre	[s]
length	kelvin	[m]
temperature	second	[K]

Language Exercises

RHNswyz4t5hWG

Exercise 17

Indicate which pairs of expressions or words are translated correctly.

przyśpieszenie bezwzględne - absolute acceleration
spadek swobodny - free fall
ruch poziomy - horizontal movement
moc maksymalna - maximum power
siła wyporu - effective pulling force
efektywna siła ściągająca - buoyant force

zadanie