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Gravitational acceleration and free fall PBD test

Total questions: 69

Worksheet time: 3570secs

Name
Class
Date
1.

What would you be measuring if you had the object's speed and direction

a)

momentum

b)

velocity

c)

force

d)

weight

2.
The picture of the position vs. time graph shows an object that is...
a)
accelerating/speeding up
b)
moving at a constant speed 
c)
not moving 
d)
accelerating/slowing down. 
3.
What is the standard unit force is measured in?
a)
Newtons
b)
pounds
c)
grams
d)
meters
4.

If a ball is thrown up and lands at the same location, what was its acceleration?

a)

-10 m/s2 on the way up and +10 m/s2 on the way down.

b)

-10 m/s2 the entire time.

c)

+10 m/s2 on the way up and -10 m/s2 on the way down.

5.

Free fall is

a)

moving through the air under the influence of the force of gravity only.

b)

not paying for a fall.

c)

clothing sale with lots of orange & brown clothes.

d)

a feather dropped from an airplane.

6.

If a ball is thrown up and lands at the same location, what was its acceleration?

a)

-10 m/s2 on the way up and +10 m/s2 on the way down.

b)

-10 m/s2 the entire time.

c)

+10 m/s2 on the way up and -10 m/s2 on the way down.

7.

Free fall is

a)

moving through the air under the influence of the force of gravity only.

b)

not paying for a fall.

c)

clothing sale with lots of orange & brown clothes.

d)

a feather dropped from an airplane.

8.

A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground

a)

the acceleration increases

b)

the acceleration decreases

c)

the acceleration remains constant

9.

The state that exists when the only force acting on an object is gravity is called

a)

free fall

b)

inertia

c)

acceleration

d)

momentum

10.

Heavier objects free fall faster than lighter objects.(in the absence of the air resistance)

a)

True

b)

False

11.
Do free falling objects move at constant velocity or do they accelerate?
a)
Falling objects accelerate at -9.8 m/s2
b)
Falling object move at constant velocity
c)
Falling objects accelerate at 100 m/s2
d)
It depends on the mass: heavy objects accelerate, light objects do not
12.
Which would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?
a)
the feather
b)
the metal bolt
c)
They would hit the ground at the same time.
d)
They would be suspended in a vacuum.
13.
When there is no air resistance, objects of different masses dropped from rest
a)
fall with equal accelerations and with equal displacements.
b)
fall with different accelerations and with different displacements.
c)
fall with equal accelerations and with different displacements.
d)
fall with different accelerations and with equal displacements.
14.
Which would fall with greater acceleration in a vacuum—a leaf or a stone?
a)
the leaf
b)
the stone
c)
They would accelerate at the same rate.
d)
It is difficult to determine without more information.
15.
In a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?
a)
They don't; they hit the ground at the same time.
b)
One is more dense than the other.
c)
One is heavier than the other.
d)
Air resistance 
16.
What is the velocity of a ball that has been dropped off a cliff after 1 , 2, 3, 4, and 5 seconds? (assume g is rounded to 10 m/s2)?. 
a)
10, 20, 30, 40, 50 m/s
b)
5, 10, 15, 20, 25 m/s
c)
5, 20, 45, 80,125 m
d)
10,10,10,10,10 m/s
17.

§If an object is simply dropped from an elevated height, then the _____________of the object is 0 m/s.

a)

initial velocity

b)

final velocity

c)

acceleration

18.

§All free-falling objects (on Earth) accelerate downwards at a rate of_____________

a)

9.8m/s29.8m/s^2  

b)


—9.8m/s2—9.8m/s^2  

c)

—9.8m/s—9.8m/s^{ }  

19.

In free fall acceleration

a)

is constant during upward and downward motion

b)

is constant during upward motion only

c)

is constant during downward motion only

20.

When we throw an object up in the air, its velocity at the peak _______

a)

cannot be calculated

b)

equal to the gravitational acceleration

c)

Zero

21.

Objects thrown into the air have a downward acceleration

a)

only in its way upwards

b)

only in its way downwards

c)

as soon as they are released

22.

Consider a heavy and a light person jumping together with same-size parachutes from the same altitude. Who will reach the ground first? (in NON-freefall)

a)

Light person

b)

Heavy person

c)

Both will reach at the same time.

23.

Click on the check box if you think the statements is correct.

Question : In a condition that a big rock and a pebble are being thrown from a very high mountain from the same height and at the same time. Suppose also that air resistance is neglected. Which statements below is true in describing both objects?

a)

The big rock and the pebble each have the same force of gravity.

b)

The big rock has more mass, thus both objects will have different force of gravity.

c)

The big rock experiences a greater force of gravity, yet both the rock and feather have the same mass.

d)

On earth, all objects (whether the rock or the pebble) will have different force of gravity.

e)

The big rock weighs more than the feather, yet they each have the same mass.

24.

Consider a heavy and a light person jumping together from the same altitude IN FREE FALL. Who will reach the ground first?

a)

Light person

b)

Heavy person

c)

Both will reach the ground at the same time.

25.

As a rock in FREE FALL falls through the air, Velocity

a)

stays constant

b)

decreases until it hits terminal velocity

c)

increases until it hits terminal velocity

d)

increases ~10 m/s each second

26.

As a rock in FREE FALL falls through the air, acceleration

a)

stays constant

b)

decreases until it hits terminal velocity

c)

increases until it hits terminal velocity

d)

increases ~10 m/s each second

27.

Air friction (Air Drag) against a skydiver

a)

acts upward

b)

increases with increased surface area

c)

increases with increased speed

d)

all of these

28.
In a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?
a)
They don't; they hit the ground at the same time.
b)
One is more dense than the other.
c)
One is heavier than the other.
d)
Air resistance 
29.

An object in free fall

a)

ignores air resistance.

b)

undergoes a downward acceleration.

c)

has an acceleration of -9.8 m/s2.

d)

all of these.

30.

When there is no air resistance, objects of different masses dropped from rest

a)

fall with equal accelerations and with equal times.

b)

fall with different accelerations and with different times.

c)

fall with equal accelerations and with different times.

d)

fall with different accelerations and with equal times.

31.

Which of the following graphs best represents free fall motion?

a)

b)

c)

d)

32.

Heavier objects free fall faster than lighter objects.

a)

True

b)

False

33.

What is the value of the gravitational acceleration, g?

a)

5 ms-2

b)

10 ms-2

c)

15 ms-2

d)

20 ms-2

34.

free fall only occurs in a vacuum, that is in a space with no air.

a)

true

b)

false

35.

In a vacuum chamber, a chicken feather and a tennis ball that are released from the same height will reach the bottom of the chamber simultaneously.

a)

true

b)

false

36.

Objects falling freely, fall with the same gravitational acceleration no matter what their mass and shape are.

a)

true

b)

false

37.

Time taken to reach the ground by a free falling object is shorter than a non-free falling object.

a)

false

b)

true

38.

Which of the following graph represent free fall of an object?

a)

A

b)

B

c)

C

d)

D

39.

A coin and a leaf is released at the same time in a

vacuum cylinder. Which of the following observation

is correct?


a)

The coin reaches the base of the cylinder first.

b)

The leaf reaches the base of the cylinder first.

c)

The coin and the leaf reach the base of the

cylinder at the same time.

d)

The coin and the leaf float in the cylinder.

40.

Which of the following statement is correct about free fall?

a)

affected by air resistance

b)

fall with no force acting on it

c)

fall with no acceleration

d)

Takes place in vacuum only.

41.
What happens to the velocity of a ball as it is dropped off a cliff? 
a)
It decreases at a uniform rate 
b)
It increases at a uniform rate 
c)
It is constant 
d)
It increases at a non-uniform rate
42.

A textbook is dropped from a second floor window and falls to the ground. What happens to the velocity as the book falls to the ground

a)

the velocity increases

b)

the velocity decreases

c)

the velocity remain constant

43.

A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground

a)

the acceleration increases

b)

the acceleration decreases

c)

the acceleration remains constant

44.

A baseball is thrown up into the air. What happens to the velocity as the ball rises in the air?

a)

the velocity increases

b)

the velocity decreases

c)

the velocity remains constant

45.

A baseball is thrown up into the air. What happens to the acceleration as the ball rises in the air?

a)

the acceleration increases

b)

the acceleration decreases

c)

the acceleration remains constant

46.

A baseball is thrown up into the air. What direction is the velocity of the ball?

a)

upward

b)

downward

47.

A baseball is thrown up into the air. What direction is the acceleration of the ball?

a)

upward

b)

downward

48.

The diagram shows a coin, marble and dried leaf being released at the same time in a vacuum cylinder. Which observation is correct?

Rajah menunjukkan sekeping syiling,sebiji guli dan sehelai daun kering dilepaskan pada masa yang sama dalam sebuah silinder vakum. Pemerhatian yang manakah adalah benar?

a)

All three objects float in the cylinder

Ketiga-tiga objek terapung dalam silinder

b)

All three objects reach the base at the same time

Ketiga-tiga objek sampai ke dasar dalam masa yang sama

c)

The marble reaches the base earlier than the coin

Guli sampai ke dasar lebih awal daripada syiling

d)

The marble and coin reach the base earlier than the dried leaf

Syiling dan guli sampai ke dasar lebih awal daripada daun kering

49.

The diagram shows a brick falling from a table. What physical quantity of the brick is constant while it is falling?

Rajah menunjukkan sekeping batu bata jatuh dari meja. Apakah kuantiti fizik batu bata itu yang malar semasa ia jatuh?

a)

Potential energy

Tenaga keupayaan

b)

Kinetic energy

Tenaga kinetik

c)

Acceleration

Pecutan

d)

Velocity

Halaju

50.

Diagram shows two metal spheres, P and Q. Which of the following statements is true when P an Q are in free fall?

Rajah menunjukkan dua sfera logam, P dan Q. Antara pernyataan berikut, yang manakah benar apabila P dan Q sedang jatuh bebas?

a)

The velocities of P and Q are the same

Halaju P dan halaju Q adalah sama

b)

The accelerations of P and Q are the same

Pecutan P dan pecutan Q adalah sama

c)

The momentum of P and Q are the same

Momentum P dan momentum Q adalah sama

d)

The gravitational force acting on P and on Q are the same

Daya graviti yang bertindak ke atas P dan Q adalah sama

51.

Diagram shows a coin and a feather experiencing free fall in a vacuum container. Which physical quantity is constant?

Rajah menunjukkan sekeping duit syiling dan sehelai bulu ayam yang sedang jatuh bebas di dalam bekas vakum. Kuantiti fizik yang manakah tetap?

a)

Velocity

Halaju

b)

Acceleration

Pecutan

c)

Momentum

Momentum

d)

Kinetic energy

Tenaga kinetik

52.

A brick falls from a height of 10 m. Calculate the time taken for the brick to reach the ground.

Seketul bata jatuh dari ketinggian 10 m. Hitung masa yang diambil untuk bata itu sampai ke tanah.

a)

0.5 s

b)

0.7 s

c)

1.0 s

d)

1.4 s

53.

Diagram shows two trolleys of different masses. Both trolleys move at the same velocity and fall over the edge of the table and hit the floor. What is the same physics quantity for both trolley?

Rajah menunjukkan dua buah troli yang berlainan jisim. Kedua-dua troli itu bergerak dengan halaju yang sama ke arah tepi meja sehingga jatuh menghentam lantai. Apakah kuantiti fizik yang sama bagi kedua-dua troli tersebut?

a)

Gravitational potential energy

Tenaga keupayaan graviti

b)

Time taken to hit the floor

Masa yang diambil untuk menghentam lantai

c)

Kinetic energy

Tenaga kinetik

d)

Momentum

Momentum

54.

Diagram shows a stoboscopic photograph of a ball dropped from a height. Which physics quantity remain constant as the ball falls?

Rajah menunjukkan gambar foto stroboskop bagi sebiji bola yang dijatuhkan daripadu suatu ketinggian. Kuantiti fizik manakah yang tetap semasa bola itu jatuh?

a)

Velocity

Halaju

b)

Momentum

Momentum

c)

Acceleration

Pecutan

d)

Kinetic energy

Tenaga kinetik

55.

Diagram shows a feather and a stone falling freely in a vacuum. Which statement is correct about the motion?

Rajah menunjukkan sehelai bulu dan sebiji batu yang sedang jatuh bebas di dalam vakum. Pernyataan manakah yang betul mengenai pergerakan itu?

a)

The feather and the stone fall with constant velocity

Bulu dan batu itu jatuh dengan halaju seragam

b)

The feather and the stone have the same kinetic energy

Bulu dan batu itu mempunyai tenaga kinetik yang sama

c)

The feather and the stone reach the ground at the same time

Bulu dan batu itu sampai ke tanah pada masa yang sama

d)

The gravitational force acting on the feather and the stone are the same

Daya graviti yang bertindak ke atas bulu dan batu adalah sama

56.

Diagram shows a mango falling from a tree. Which acceleration-time graph represents the motion of the mango?

Rajah menunjukkan sebiji mangga jatuh dari sebatang pokok. Graf pecutan-masa manakah yang mewakili gerakan buah mangga itu?

a)
b)
c)
d)
57.

Diagram shows a PVC vacuum tube is erected vertically. Three identical spheres made of cork, c, rubber, r and steel, s are dropped through the tube. The time, t taken to reach the base of the tube is recorded as tc, tr and ts respectively. Which comparison is correct?

Rajah menunjukkan tiub vakum PVC yang ditegakkan secara mencancang. Tiga sfera serupa yang diperbuat daripada gabus, c, getah, r dan keluli, s dijatuhkan melalui tiub itu. Masa, t untuk sampai ke dasar tiub itu dicatatkan sebagai tc, tr dan ts masing-masing. Perbandingan manakah yang betul?

a)

ts > tr > tc

b)

tc > tr > ts

c)

tr > ts > tc

d)

tr = tc = ts

58.

Diagram shows a load with a mass of 20 g is dropped in a vacuum cylinder when a magnet is removed. The time for the load to fall is recorded. This experiment is repeated with the masses of the load 40 g, 60 g, 80 g and 100 g. Which graph shows the correct relationship between gravitational acceleration, g and mass, m?

Rajah menunjukkan sebuah pemberat berjisim 20 g dijatuhkan ke dalam satu silinder vakum apabila magnet dialihkan. Masa pemberat untuk jatuh dicatatkan. Eksperimen ini diulangi dengan pemberat berjisim 40 g, 60 g, 80 g dan 100 g. Graf manakah yang menunjukkan hubungan yang betul antara pecutan graviti, g dengan jisim, m?

a)
b)
c)
d)
59.

Karim's weight on Earth is 800 N. What will happen to his weight on the moon?

Berat Karim di Bumi ialah 800 N. Apakah yang akan berlaku kepada beratnya di bulan?

a)

Increased

Bertambah

b)

Decreased

Berkurang

c)

Unchanged

Tidak berubah

d)

Become zero

Menjadi sifar

60.

Gravitational force causes an object to always fall downwards.

a)

True

b)

False

61.

The symbol used to represent gravitational acceleration is g.

a)

True

b)

False

62.

The value of gravitational acceleration on the surface of earth is 10ms-2

a)

true

b)

false

63.

Figure shows a coin and a feather falling simultaneously inside two transparent cylinder tubes, R dan S. Cylinder tube R contains, air whereas cylinder tube S is a vacuum. What is meant by a free fall?

a)

not occurs vacuum

b)

occur with resistance

c)

affects by air motion

d)

effects by gravitational force

64.

Figure shows a coin and a feather falling simultaneously inside two transparent cylinder tubes, R dan S. Cylinder tube R contains, air whereas cylinder tube S is a vacuum. Compare the time taken between feather and coin in S?

a)

time taken for coin shorter than feather

b)

time taken for feather shorter than coin

c)

both coin and feather have same time taken

65.

Figure shows a coin and a feather falling simultaneously inside two transparent cylinder tubes, R dan S. Cylinder tube R contains, air whereas cylinder tube S is a vacuum. Compare the time taken between feather and coin in R?

a)

time taken for coin shorter than feather

b)

time taken for feather shorter than coin

c)

both coin and feather have same time taken

66.

Figure shows a coin and a feather falling simultaneously inside two transparent cylinder tubes, R dan S. Cylinder tube R contains, air whereas cylinder tube S is a vacuum. Free fall occurs if no air resistance acts on it?

a)

trues

b)

false

67.

The figure above shows an experiment to study the time taken for an object to fall during free fall and non free fall motions. State the manipulated variable for this experiment.

a)

presence of air

b)

time taken for objects to fall on rubber

c)

height of an object

68.

The figure above shows an experiment to study the time taken for an object to fall during free fall and non free fall motions. State the responding variable for this experiment.

a)

presence of air

b)

time taken for objects to fall on rubber

c)

height of an object

69.

The figure above shows an experiment to study the time taken for an object to fall during free fall and non free fall motions. State the constant variable for this experiment.

a)

presence of air

b)

time taken for objects to fall on rubber

c)

height of an object

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