Physics Lab Worksheet

Istanbul Commerce University

Physics Lab I –(13.12.2016)

power prefix abbreviation power prefix abbreviation

10-2 centi c 103 Kilo k

10-3 mili m 106 Mega M

10-6 mikro 109 Giga G

10-9 nano n 1012 Tera T

Quantity SI unit cgs Unit Dimension

Length m cm L

Mass kg g M

Time s s T

1-) Convert the measuring units as indicated

a) L=360 km/h = ………………cm/s

b) M= 250g W(weight) = …………. Newton (g=10 m/s2)

c) = 800 µm T = …………. s (for electromagnetic wave, c=3.108 m/s), c = /T

d) V = 3 kg/cm3 =………………………. g/m3

e) Write the SI (mks) units and dimensions of given quantities

Physical Quantity SI (mks) Unit system Dimension

Example: Mass, M

kg M

Velocity, V (=x/t)

Acceleration, a (=V/t)

Angular Velocity, w (/t)

Tork, (=r x F)

Momentum, P = MV

Moment of Inertia, I (=Mr2)

2-) Answer the questions.

a.) b.) A man walked north 60km and then west 80km. Determine… the total distance of the entire trip=? the total displacement of the entire trip=?

c.) What will be happen, when a ring and a disc which are equal diameter and equal mass (inertia) will drop in the

same time on a inclined plane? (Note that: Iring > I disc)

3-) a) In the given picture below, Alice throws the ball to the +x direction with an initial velocity V0 (m/s). Time elapsed

during the motion is 5s, calculate the height and range (L) of the ball.

b-)

d) Calculate the angular momentum of disk about center of mass,

and disk about diameter. L= I

[I1 = (1/2)Mr2, I2 = (1/4)Mr2, 1 = 2 = 10 rad/s) , M= 1kg, r= 0,1 m]

An astronaut take some measurement on the moon with using a simple pendulum. A simple pendulum has a frequency of 4 Hz on Earth. It is brought to Moon where g is 17% of its value on Earth. What will be the pendulum’s

frequency on Moon? Remember ! T=2√𝐿

𝑔 and T = 1/f

r(t) = r0 + V0t + (1/2)at2

Vfinal = V0 + at

V

L

Just use them !

A basketball player attemps to make a basket

from a distance of x (m). The basket is y1 (m)

high and the ball leaves his hands from a height

of y0 If he throws the ball at an angle of 45

degrees, what does the initial velocity of the

ball need to be? (sin450=cos45

0=0,7)

4-) Match the true definition with the true explanation.

Definition Explanation Matching

1- Frequency A - the resistance an object has to a change in its state of

motion.

1 - ?

2- Newton's first law of

motion

B- It is a vector quantity that represents the product of a

body's rotational inertia and rotational velocity about a

particular axis.

2 - ?

3 - Angular momentum C…..is the time taken for one full oscillation 3 - ?

4- Inertia D – An object at rest stays at rest and an object in motion

stays in motion with the same speed and in the same direction

unless acted upon by an unbalanced force.

4 - ?

5- Period E- it is the number of occurrences of a repeating event per

unit time.

5 - ?

6 - Moment of inertia

F – it refers to various phenomena which occur when a wave

encounters an obstacle or a slit. In classical physics, the

phenomenon is described as the interference of waves

according to the Huygens Fresnel principle

6 - ?

7 - Diffraction

G…..is the emission or transmission of energy in the form of

waves or particles through space or through a material

medium

7 - ?

8-Torque H……..is the force resisting the relative motion of solid

surfaces, fluid layers, and material elements sliding against

each other

8 - ?

9-Friction I - is the mass property of a rigid body that determines the

torque needed for a desired angular acceleration about an axis

of rotation.

9 - ?

10 - Radiation J-…….is the tendency of a force to rotate an object about an

axis,fulcrum, or pivot.

10- ?

5-) The following measurements were taken in an experiment. F (N) is force which is acting on an object, and a (m/s2) is the acceleration of this object. Answer the questions about given graphics.

a) Which quantity should be on x-axis? Write on the graphics.

b) Which quantity should be on y-axis? Write on the graphics.

c) A = 10 what is the SI unit and dimension of A?

d) B = 0,6667 what is the SI unit and dimension of B?

e) Write the general form of the equation with F,A,B,V.

K) Draw the weight vector (W) of this car on the picture.

L) Draw the normal vector (N) of act on the car on the Picture

M) Draw the centripetal acceleration vector (aR) on the Picture

N) Draw the friction force (Ff) acts up the incline, to keep the car

from sliding toward the center of the turn

1) a-) Please fill in the blanks correctly.

b) Find the frequencies of given electromagnetic waves. REMEMBER ! c=f, c=3.108 m/s

= 900 nm f = ………………………………. Hz, T= ………………………….s

= 300 cm f = ………………………………. Hz, T= ………………………….s

= 30 km f = ………………………………. Hz, T= ………………………….s

2) The following measurements were taken in an experiment. t (0C) is temperature of a material, and M (g) is

mass of this material. Answer the questions about given graphics.

a) Which quantity should be on the x-axis, write on the graph.

b) Which quantity should be on the y-axis, write on the graph.

c) According to the given formula (y=….) If A =0,9 what is the unit of A?

d) If B= 0,05 what is the SI unit of B?

e) Write the general form of the equation with using A, B, t, M.

F(N) a(m/s2)

0,5 1,1

0,6 1,3

0,7 1,6

0,8 1,8

0,9 2,0

1 2,2

1,1 2,4

1,2 2,7

1,3 2,9

1,4 3,1

1,5 3,3

1,6 3,6

Quantity Unit (SI=MKS) Dimension

Period (T)

Frequency (f)

Wavelength ()

Velocity (V=x/t)

Acceleration (a=V/t)

Force (F=ma)

f) According to the given graph, approximately what will be the mass of this matetial at 80 degrees?

M(t=80) =?

3) Fill in the blanks with given words

a) velocity g) wavelength

b) frequency h) SI unit system

c) period i) amplitude

d) simple pendulum j) Measurement

e) diffraction

i.e. The________ of an object is the rate of change of its position with respect to a frame of reference, and is a function of time.

a) velocity

________is the modern form of the metric system, and is the most widely used system of measurement.

?

________is the number of occurrences of a repeating event per unit time. ?

_______ is the time for one object to complete an orbit around another ?

_______ is a weight (or bob) on the end of a massless cord suspended from a pivot, without friction. When given an initial push, it will swing back and forth at a constant amplitude.

?

________of a periodic variable is a measure of its change over a single period (such as time or spatial period).

?

______ is the assignment of a number to a characteristic of an object or event, which can be compared with other objects or events.

?

In classical physics, ________ is described as the interference of waves according to the Huygens–Fresnel principle.

?

____________ is usually determined by considering the distance between consecutive corresponding points of the same phase, such as crests, troughs, or zero crossings and is a characteristic of both traveling waves and standing waves.

?

t (0C) M (g)

25 3,141

30 4,034

35 5,179

40 6,650

45 8,539

50 10,964

55 14,078

60 18,077

65 23,211

70 29,804

75 38,269

4) Convert the measuring units as indicated

a) 36 km/h = _____________ m/s = _____________ cm/min

b) 1 mm/s = ______________ km/h

c) 0,08 g/cm3 = ________________ kg/m3

d) 0,3 m/kg = ____________cm/g

e) 660 Hz = ______________ 1/minute

h) 750 N = __________________=kgm/s2 =______________gcm/s2

5) Answer the test questions.

5.1 The relationship between four physical quantities a,b,c and t is given by a = b3c – c/t, where t is time. If the

dimension of [a]=L,

What is the dimension of [c]=? a.) L b.) LT c.) LT-1 d.) T

What is the dimension of [b]=? a.) T-3 b.) T3 c.) T-1/3 d.) L-1

What is the dimension of [ab]=? a.) T-3 b.) LT c.) LT3 d.) LT-1/3

What is the dimension of [b3c] =? a.) LT3 b.) L c.) T-1/3 d.) LT-3

What is the dimension of [a2b3]=? a.) L2T b.) L2T3 c.) L2T-2 d.) LT-1/3

5.2. The diagram represents a portion of triple-beam balance. What is the total mass? a) 960.082 g b) 9.682 g c) 968.2 g d) 968.02 gram

5.3. Find the height of the boy.

1) a.) Fill the blanks with your experiments, choose any two of them (please use your own words).

Name of the experiment

Purpose

Measured Physical

Quantities

b.) Convert the measuring units as indicated.

I=0,2 kg m2 = ……………………….g cm

2

MA =500 g WA(weight on the moon) = …………………. Newton (gmoon=1.66 m/s2)

= 500 mm T = ………….s (for electromagnetic wave)

V = 6 kg/cm3 =………………………. g/m

3

b) The weight of an object is measured with an inaccurate dynamometer. Try to estimate the behavior of

dynamometer by drawing a simple graph. And try to estimate what will be the 15th measurement by using this

dynamometer?

d) Why does a ice-skater speed up when she pulls in her arms? Show the angular velocity vector

and angular momentum vector of her on the picture.

Number of

measurement

1 2 3 4 5 6 7 8 9 10 11 12 13 14

G (N) 0,4 0,45 0,5 0,55 0,6 0,65 0,6 0,55 0,5 0,45 0,4 0,45 0,5 0,55

5) A Car is driven around a circle with a radius of r. Bank angle degrees.

The static frictional coefficient is . A) Show the free body diagram on this car. B) Calculate the maximum

velocity the car can travel with function of (, , g, r). V = f (, , g, r,…).

H

V0

V0

L

4) A hot- air balloon having initial velocity v0 rises. A stone

dropped from this balloon, when it is H (m) height. The

stone will hit the car,( which is coming towards to

balloon with a constant velocity V0), after t seconds.

Find the time “t”, with function of V0, L, H, g)

g: gravitational acceleration

t = f(V0, L, H, g) ????

x

y

6) Show free body diagrams of given objects. And calculate the accelerations of the objects with using

Newton’s Laws.

=0

2M

M

=0

=0

I = 0