**1. 6° want to determine what affects the consumption of gasoline of a car, to find this we measured the gasoline consumption in three experiments, varying the average speed of the car, the mass of the car and the height of the place where they were, keeping constant the type of car, the distance traveled and the type of gasoline. The following **

**data tables show the gasoline consumption of a vehicle according to the average speed, mass, and height of the place.**

Write the dependent, independent and control variables for experiment # 1, propose a hypothesis. After analyzing the data, make the graph and write conclusions related to the table # 1.

Sail - 1400 kg - 1 persona - 500 km - Gaso Extra - Bogota

V

PROMEDIO

(km/h)

Exp. 1

**50**

**80**

**100**

25

64

105

Consumo (Galones)

Exp. 2

24

69

99

Exp. 3 Prom. Exp.

28

66

101

Sail - 50 km/h - 500 km - Gaso Extra - Bogota

Masa

(kg)

Pasageros Exp. 1

**1400 (1)**

**1600 (3)**

**1800 (5)**

25

28

33

Consumo (Galones)

Exp. 2

24

27

32

Exp. 3 Prom. Exp.

28

30

33

Sail - 1400 kg - 50 km/h - 500 km - Gaso Extra - 1 persona

Ciudad

Altura (m)

**Bog (2700)**

**Cart (0)**

**Med (1500)**

Exp. 1

25

26

24

Consumo (Galones)

Exp. 2

24

23

26

Exp. 3 Prom. Exp.

28

27

27

**2. Jack travels at 108 Km/h, John at 31 m/s and Ana at 197 ft/min. Who´s the winner**

**3. Solve following problems. **

A. A Carl travels at 80 km/h during 4.5 h. Find the distance traveled and its acceleration.

B. A dog walks 3000 m in 15 minutes. (express it in m and s). Find its velocity and its acceleration.

C. A girl runs at 45 m/s traveling 225 m. Find the time used and its acceleration.

D. A car accelerates from 36 m/s to 54 m/s in 3 s. Find its acceleration and the distance traveled.

E. A car starts from rest and accelerates to 18 m/s travelling 900 m. Find the time used and its acceleration.

F. A car travels at 10 m/s and accelerates to 34 m/s with an acceleration of 3 m/s2. Find the time used and its distance.

G. A box is pushed with a force of 235 N during 10 s, the box is displaced 10 m. The mass of the box is 20 kg. Find the work and the power done.

H. A men is lifting a 750 kg box from the floor to a high shelf in 15 s, the height is 20 m. Find the work and the power.

I. A car travels 16 minutes at 25 m/s, the mass of the car is 1200 Kg. Find the energy in the car due its speed.

J. If the height of a playground (height = 125 m) there is a big ball (mass = 60 kg). What energy is associated to the ball?

Find the energy accumulated in the ball due its height. h = 24,2m m/s

K. Find the total energy of a plane (5000 kg) travelling at 250 m/s and 4000 m above the sea level.

**4. According to the diagram complete the tables. **

v = 18 m/s

**5. According to the diagram complete the diagram and the table.**

V = 22 m/s

**3**

**. **

**2. **

**1. **

**5. **

**4. **

20

18

16

14

12

10

-6

-8

-10

-2

-4

2

0

8

6

4

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

B. ____________________

C. ____________________

B.

C.

D.

F.

G.

H.

I.

J.

K.

B. ____________________

C. ____________________

D. ____________________

EP

Ek

ET

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