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Transcript
```PHYSIC LABORATORY REPORT
NAME: NORHIDAYU BINTI HASSAN
MATRIC NO.: 2013689362
EXPERIMENT: 5
PARTER’S NAME:
1. ILHAM HASANAH
3. IMAN
INTRODUCTION:
The continuous pull which caused the glider to speed up was made possible by attaching the
glider to a hanging mass at the end of the air track. The hanging mass was allowed to fall
down onto the floor which then pulled the glider along with it. The acceleration or speeding
up of the glider happened because the hanging mass caused it to speed up. The falling of
the hanging mass is a natural phenomenon and is attributed to the gravitational pull by the
earth on all objects near the surface of the earth. This experiment can be explained with the
Newton’s law. For the Newton’s first law state that when the object at the rest it will remain at
rest and if the object moving it will keep moving at the constant motion. Newton’s second law
stated that force that acting on the object equal to the mass times acceleration. Newton’s
third law stated that for every action there have equal and opposite reaction. This shows that
for the activity in the experiment applied the Newton’s law.
Activity 1: Observe, record and discuss the motion of objects in a free fall.
OBJECTIVE:
1. Determine the acceleration of objects undergoing a fall without any restraint (this is
termed free fall) by using ticker tapes.
2. Determine the acceleration of objects that fall down vertically (free fall).
MATERIAL:
1.
2.
3.
4.
5.
6.
7.
A small metal ball,
A tennis ball,
A ticker timer,
A power supply for the timer,
Ticker tapes
A ruler
stopwatch
METHOD:
1.
2.
3.
4.
5.
6.
The apparatus was set up.
The height of the experiment was 5m
The small metal ball was released at height at 5m
Make sure that there no force that acting on the metal ball to avoid the inaccurate result.
Time taken that the ball taken to reached the ground was recorded.
Then, the experiment was repeated with the tennis ball.
Activity 2:
Objective: Observe & record the motion of objects being thrown up vertically.
Observed, recorded and discussed the motion of objects along the vertical direction when
the object is thrown vertically up and when it fall back down to its initial position.
APPARATUS AND MATERIALS
1.
2.
3.
4.
5.
2 metal balls of different diameters,
A tennis ball,
A Styrofoam ball,
A pen or pencil and
A stopwatch.
METHOD:
1. The experiment has been done at the outside.
2. One of member group had to be experimental instruments that have to thrown the
object upward with the same force to get the same result.
3. The person that thrown the object must be the same person.
4. The times taken for the object fall have been recorded.
5. The experiment was repeated with the tennis ball, small metal ball, big metal ball,
polystyrene and pencil.
ACTIVITY 3: 1: Observe & record the horizontal motion of objects that are
simultaneously.
OBJECTIVE:
Object and observe, describe and explain the horizontal motion of the object as the
magnitude of the pull.
APPARATUS AND MATERIALS:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Air track
Power supply,
A glider (or use toy cars in place of glider and air track),
2 pulleys,
2 hanging weights,
Ticker timer,
A power supply for the timer,
Ticker tapes
A ruler.
METHOD:
1.
2.
3.
4.
5.
6.
The apparatus was set up.
The weight had been hanged at the one side of the glider.
The other side of the glider was placed with the ticker tapes.
After that, the weight was released.
The reading or result from the ticker tape was recorded.
The experiment was repeated with the different weights which are 100g and 150g.
DATA AND OBSERVATION:
Metal
Ball
8.3
7.9
8.3
8.0
7.4
5.4
4.4
4.3
3.1
4.1
5.1
5.4
6.2
5.6
9.0
8.0
7.0
distance(cm)
Tennis
Ball
0.8
1.3
1.5
1.8
2.2
2.5
2.8
3.1
3.5
3.3
3.6
4.5
4.4
4.6
6.0
5.0
Tennis Ball
4.0
Metal Ball
3.0
2.0
1.0
0.0
0
Time taken (s)
1st 2nd Average
Tennis
1.84 1.59
1.72
Ball bearing (big)
1.53 1.34
1.44
Ball Bearing (small)
1.65 1.78
1.72
Polystyrene
1.02 1.18
1.10
Pencil
1.66 1.75
1.71
5
10
15
50 g
0.9
1.0
1.0
1.1
1.2
1.2
1.3
1.4
1.5
1.5
1.6
1.7
1.8
1.9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
100 g
5.1
4.5
3.2
2.1
2.2
2.3
2.6
3.1
2.2
3.0
2.8
3.1
3.2
3.4
150g
3.3
3.7
3.7
4.0
4.1
4.2
4.3
4.3
4.5
4.6
4.7
4.9
5.1
5.6
6.0
distance(cm)
5.0
4.0
3.0
100 g
2.0
150g
1.0
0.0
0.0
0.5
1.0
Axis Title
1.5
2.0
DISCUSSION:
During the experiment, my groups found that there have some error that causes the reading or
result inaccurate such as the present of resistance that also give effect to the result due to the
resistance should be zero. Besides, the human error also gives effect due to the human was the
weaker experimental instrument because human cannot give the constant force due to the human
weakness. Moreover, the instrument error involves the inaccurate result.
Then, there has some precaution should be taken to avoid the inaccurate result such as make sure
that the resistance should be zero. Besides, minimize the instrument and human error in the
experiment.
Activity 1 shows that free fall motion. This experiment shows that there have two objects that used
which are tennis ball and metal ball. Tennis ball result’s does not show the accurate result due to
the instrument and human error meanwhile the metal ball shows that consistence and more
accurate result based on the graph. During the experiment for the object fall downward or toward
the ground the initial velocity was zero. Then for the object that thrown vertically upward the final
velocity was zero due to the at initial they have force that acting on it. The activity 2 shows that the
object being thrown vertically upward with the different object.
Activity 3 should be done with the two hanging weight in both side but there have some problem
where the table are not long enough to hanging the both weight. Therefore we decide that to use
only one weight which is 50g, 100g and 150g. Then, for the 50g the graph cannot shown due to the
distance are too small than 100g and 150g. For the 150g the graph are increasing constantly
meanwhile 100g slightly inaccurate and precise.
CONCLUSION:
As a conclusion, the experiment has some error and obstacle that causes the inaccurate result
which are the human error and instrument error. Therefore the results are not as the prediction due
to the error involve. Besides, this experiment shows that the application of Newton’s law.
REFFERENCE:
1. Fourth edition Fundamental of Physic Extended(1993)
```
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