Revision on physics No. 1

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Podsumowanie wiadomości z kinematyki

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 cases of Piotr Ciekawski.

Piotrek Ciekawski is already a secondary school student; he is passionate about physics and sometimes he remembers the old good times when he was a junior‑secondary school student and he had to solve interesting tasks in physics lessons.

Imagine you are Piotrek and try to solve his tasks.

Read the text below and solve tasks 1 - 3.

The distance between Łódź and Warsaw is 120 km. A passenger car leaves Lodz at 8 am, moving at an average speed of 40 $\frac{k m}{h}$ . At 9 am, a motorcyclist sets off from Warsaw to Łódź, moving at an average speed of 60 $\frac{k m}{h}$ .

Assume that during their journey, both vehicles move along a straight line connecting both cities.

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Exercise 1

Two vehicles will meet at

09:48
09:08
09:28
09:58

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Exercise 2

The motorcyclist will meet the car after driving

48 km
18 km
28 km
60 km

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Exercise 3

When the car is exactly halfway between Łódź and Warsaw, the motorcycle is at a distance of

30 km from this car
0 km from this car
48 km from this car
60 km from this car

Read the text below and solve tasks 4 - 6.

Piotrek is keen on riding a bike. One day, while riding his bicycle at a speed of 8 $\frac{m}{s}$ , he saw his classmate Kuba 300 m ahead of him, who was also cycling, but at a speed of 18 $\frac{k m}{h}$ . Neither of the boys changes the speed of riding a bicycle.

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Exercise 4

Piotrek is approaching Kuba with the speed of

3 $\frac{m}{s}$
5 $\frac{m}{s}$
3 $\frac{k m}{h}$
5 $\frac{k m}{h}$

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Exercise 5

Piotrek will catch up with Kuba after riding the distance of

800 m
300 m
500 m
1100 m

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Exercise 6

Piotrek passed thoughtfully Kuba, who for 10 seconds did not notice this fact. After which Kuba began to call to Piotr, who was then (choose the answer below) from him

30 m
10 m
50 m
300 m

Read the text below and solve tasks 7 - 9.

Piotrek's house is located on the hill. During his ride downhill at a uniformly accelerated motion, on the road of 200 m Piotrek accelerates to the speed of 36 $\frac{k m}{h}$ .

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Exercise 7

The acceleration of Piotrek is

0,25 $\frac{m}{s^{2}}$
0,5 $\frac{m}{s^{2}}$
1,25 $\frac{m}{s^{2}}$
2,25 $\frac{m}{s^{2}}$

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Exercise 8

Piotrek accelerates on his bike within

40 s
10 s
20 s
80 s

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Exercise 9

Piotrek's average speed during the downhill ride is

5 $\frac{m}{s}$
0 $\frac{m}{s}$
10 $\frac{m}{s}$
36 $\frac{m}{s}$

Read the text below and solve tasks 10 - 12.

Riding his bike at a speed of 36 $\frac{k m}{h}$ , Piotrek notices a large hole in the road and he starts braking. Moving in a uniformly delayed motion he reduces his speed by 4 $\frac{m}{s}$ within 2 seconds.

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Exercise 10

Piotrek therefore brakes with an absolute acceleration of

2 $\frac{m}{s^{2}}$
1 $\frac{m}{s^{2}}$
4 $\frac{m}{s^{2}}$
36 $\frac{m}{s^{2}}$

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Exercise 11

Piotrek will stop within

5 s
1 s
2 s
10 s

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Exercise 12

Piotrek will not fall into the hole if it is located at a minimum distance of (choose the answer below) from him, when he started to brake

25 m
50 m
75 m
100 m

Read the text below and solve tasks 13 - 15.

Piotrek is fond of playing football in his spare time. Recently, he has been fascinated with vertical kick‑ups. To simplify the task, let's assume that the initial position of the ball is 1 m above the ground, and at the time of the kick the speed of the ball is directed vertically upwards.
Assume that after the kick, the ball moves up with an acceleration of 10 $\frac{m}{s^{2}}$ .

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Exercise 13

To reach a maximum height of 6 m, the initial speed of the ball must have a value of

10 $\frac{m}{s}$
1 $\frac{m}{s}$
5 $\frac{m}{s}$
6 $\frac{m}{s}$

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Exercise 14

After a very strong kick the ball flew in the air to the height of 20 m. From this height the ball will fall down within

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Exercise 15

The speed at which the ball hit the ground had a value of

20 $\frac{m}{s}$
5 $\frac{m}{s}$
10 $\frac{m}{s}$
25 $\frac{m}{s}$

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Exercise 16

Exercises

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Exercise 17

Indicate which pairs of expressions or words are translated correctly.

przyspieszenie - acceleration
prędkość średnia - average speed
odległość - distance
położenie początkowe - initial position
ruch jednostajnie przyspieszony - uniformly delayed motion
ruch jednostajnie opóźniony - uniformly accelerated motion

zadanie