Free Printable Physics mid term revision

1.

A spring has a spring constant of 330 N/m. How far is the spring compressed if 150 N of force are used?

a)

2.2 m

b)

0.0014 m

c)

5.0 m

d)

0.45 m

2.

If F is force, k is spring constant and x is extension, Hooke's Law tells us that:

a)

F=k/x

b)

x=Fk

c)

k=Fx

d)

F=kx

3.

Which statement most accurately represents Hooke's Law?

a)

The stretch of a spring is directly proportional to the force applied.

b)

The stretch of a spring is proportional to the number of coils.

c)

The stretch of a spring is inversely proportional to the force applied.

d)

Thickness of a spring wire is proportional to the force applied.

4.

As the hand pulls down on the mass, the spring constant _______, assuming that it doesn't pass the elastic limit of the spring.

a)

increases

b)

decreases

c)

remains constant

d)

needs more information

5.

What force should be applied to compress a spring by 0.05 m if its spring constant is k = 1500 N/m?

a)

1880 N

b)

75 N

c)

30000 N

d)

7500 N

6.

Which of the following springs is the stiffest?

a)

A spring that requires a force of 2000 N to compress it by 5 m.

b)

A spring that requires a force of 4000 N to stretch it by 10.0 m.

c)

A spring that requires a force of 2400 N to compress it by 4m.

d)

A spring that requires a force of 4800 N to stretch it by 12 m.

7.

Hooke's Law fails when a material reaches its:

a)

breakdown

b)

elastic limit

c)

end of tether

d)

fracture stress

8.

A graph of extension against force for an elastic material is:

a)

A downward curve

b)

An upward curve

c)

A straight line from any point on the x and y axis

d)

A straight line from the origin

9.

What type of force is shown inside of the picture?

a)

Tension

b)

Friction

c)

Elastic

d)

Gravitational

10.

For two or more springs in PARALLEL, the resulting spring constant is given as:

a)

$\frac{1}{k}=\frac{1}{k_1}+\frac{1}{k_2}+...$

b)

$k=k_1+k_2+...$

c)

$k=\frac{1}{k_1}+\frac{1}{k_2}+...$

d)

$\frac{1}{k}=k_1+k_2+...$

11.

For two or more springs with spring laid in SERIES, the resulting spring constant k is given as:

a)

$\frac{1}{k}=\frac{1}{k_1}+\frac{1}{k_2}+...$

b)

$k=k_1+k_2+...$

c)

$k=\frac{1}{k_1}+\frac{1}{k_2}+...$

d)

$\frac{1}{k}=k_1+k_2+...$

12.

Ropes, cords, and springs all stretch when you pull them.

a)

True

b)

False

13.

The force in a rope that is being stretched is called ..............................

a)

gravitational potential energy

b)

tension

c)

friction

14.

If something is ................................, it will go back to its original length when you remove the force

a)

nonelastic

b)

elastic

c)

plastic

15.

The amount that something stretches is called the ...............................

a)

extension

b)

intension

c)

friction

16.

The amount that something stretches is called the ...............................

a)

extension

b)

intension

c)

friction

17.

If something is ..............................., and does not go back to its original length after stretching, we say it is plastic.

a)

elastic

b)

not elastic

18.

A bigger force will produce a smaller extension.

a)

False

b)

True

19.

Elastic materials will break if the force applied to them is too big.

a)

True

b)

False

20.

At point P, _______.

a)

the force applied to the spring is equal to its elongation

b)

Hooke's Law ceases to be valid

c)

the spring is can be stretched but still springs back into shape reversibly

d)

the spring constant increases

21.

Two pendulums are in simple harmonic motion. Pendulum A is longer than pendulum B. Pendulum A has a larger mass than B. The period of pendulum A is

a)

longer than pendulum B

b)

shorter than pendulum B

c)

the same as pendulum B

d)

not enough information

22.

SI units of angular displacement are

a)

radian

b)

Degree

23.

360 degrees in radians is

a)

$\pi$

b)

$2\pi$

c)

$\frac{1}{2\pi}$

d)

3.14

24.

2 cars are moving at the speed of 22 m/s.

the radius of the 1st vehicle's tire is 22 cm

and of the 2nd vehicle's tires is 30 cm. which tire has a greater angular speed?

a)

the 1st car

b)

the 2nd car

25.

2 cars are moving at the speed of 22 m/s.

the radius of the 1st vehicle's tire is 22 cm

and of the 2nd vehicle's tires is 30 cm. which tire has a greater angular speed?

a)

the 1st car

b)

the 2nd car

26.

A bicycle wheel with diameter .43 m rotates at 3 revolutions per second. What is the the linear velocity?

a)

7.1 m/s

b)

64.5 m/s

c)

129 m/s

d)

129 cm/s

27.

Calculate the angular velocity of a car tire with a radius of 0.31m traveling a speed of 22 m/s

a)

71 rad/s

b)

6.81 rad/s

c)

6.81 m/s

d)

68.1 rad/s

28.

At which point(s) is the ball's velocity zero?

a)

A

b)

B

c)

C

d)

D

29.

Calculate the angular frequency of a pendulum with a frequency of 1.2 Hz.

a)

7.54 rad s⁻¹

b)

5.23 rad s⁻¹

c)

1.67 π rad s⁻¹

d)

2.4 π rad s⁻¹

30.

Calculate the angular frequency of a child on a swing that completes 20 cycles in one minute.

a)

2.09 π rad s⁻¹

b)

4.02 rad s⁻¹

c)

2.09 rad s⁻¹

d)

0.48 rad s⁻¹

31.

Calculate the angular frequency of a child on a swing that completes 20 cycles in one minute.

a)

2.09 π rad s⁻¹

b)

4.02 rad s⁻¹

c)

2.09 rad s⁻¹

d)

0.48 rad s⁻¹

32.

What is the frequency of a child on a swing that goes through 12 cycles in 30 seconds?

a)

0.40 Hz

b)

2.5 Hz

c)

1.0 Hz

d)

4.0 Hz

33.

What does T stand for in the formula?

a)

angular frequency

b)

period

c)

frequency

d)

temperature

34.

What does $\omega$ stand for in the formula?

a)

angular frequency

b)

period

c)

frequency

d)

temperature

35.

What does f stand for in the formula?

a)

angular frequency

b)

period

c)

frequency

d)

temperature

36.

How many radians make up one revolution of 360 degrees?

a)

π/2

b)

π

c)

2π

d)

3π/2

37.

What is the formula for angular frequency( $\omega$ )?

a)

$\omega=2\pi T$

b)

$\omega=\frac{2\pi}{t}$

c)

$\omega=2\pi f$

d)

$f=2\pi\omega$

38.

If the body is moving in a circle of radius r with a constant speed v, its angular velocity is

a)

v²/ r

b)

vr

c)

v / r

d)

r / v

39.

Centripetal acceleration is directed

a)

directed away from the center of the circle

b)

directed towards the center of the circle

c)

it is perpendicular to the radius at that point

d)

It has no direction

40.

What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?

a)

5 m/s²

b)

17.63 m/s²

c)

10 m/s²

d)

8.81 m/s²

41.

Where will be the centre of mass of a uniform rod lies ?

a)

At its end

b)

At its middle point

c)

At its centre of its cross sectional area

d)

Depends upon its material

42.

Where the center of mass of a circle lies?

a)

At its centre

b)

Anywhere on its radius

c)

Anywhere on its circumference

d)

Anywhere on its diameter

43.

What is the amplitude of the wave?

a)

3 cm

b)

8 cm

c)

16 cm

d)

24 cm

44.

What is the wavelength of the wave?

a)

3 cm

b)

8 cm

c)

16 cm

d)

24 cm

45.

The number of cycles that are completed per second is called the ________ and is measured in _________.

a)

frequency, Hertz

b)

wavelength, meters

c)

amplitude, meters

d)

period, seconds

46.

The period of a pendulum is 10 s. What is its frequency?

a)

10 Hz

b)

1 Hz

c)

0.5 Hz

d)

0.1 Hz

47.

Frieda the fly flaps her wings back and forth 100 times each second. The period of her wings flapping is:

a)

100 s

b)

0.01 s

c)

0.01 Hz

d)

100 Hz

48.

After closing a deal with a client, Kent leans back in his swivel chair and spins around with a frequency of 0.5 Hz. What is Kent’s period of spin?

a)

120 s

b)

0.0083 s

c)

0.5 s

d)

2 s

49.

A 500g toy train completes 10 laps of its circular track in 1 min 40s. The diameter of the track is 1m. Calculate the period.

a)

0.10 s

b)

0.167 s

c)

10 s

d)

6 s

50.

The diagrams show four solid cones. The centre of mass of each cone is marked by a point labelled M.

Which cone is the most stable

a)

A

b)

B

c)

C

d)

D

51.

A heavy truck on wheels has a platform to attach to it. A man stands on the platform. The truck does not fall over.

Which position A, B, C, or D could be the centre of mass of the whole system (truck, platform and man) ?

a)

A

b)

B

c)

C

d)

D

52.

A plane lamina with centre of mass X touches the ground at point P. Which diagram shows the lamina in equilibrium?

a)

b)

c)

d)

53.

a)

They would cause the bus become unstable

b)

The would cause the bus to slow down

c)

The would increase the kinetic energy of the bus

d)

The would lower the centre of mass of the bus

54.

a)

A

b)

B

c)

C

d)

D

55.

a)

b)

c)

d)

56.

a)

A

b)

B

c)

C

d)

D

57.

How does a person become more stable in relation to my COG?

a)

The higher the COG the more stable you are

b)

If the COG is in the centre of the BOS you are stable

c)

The lower the COG, the more stable you are

58.

The diagram shows a uniform beam being used as a balance. The beam is pivoted at its centre.

A 1.0 N weight is attached to one end of the beam. An empty pan weighing 0.2 N is attached to the other end of the beam.

How many 0.1 N weights must be placed on the pan in order to balance the beam?

a)

5

b)

8

c)

10

d)

12

59.

A heavy beam rests on two supports. The diagram shows the only three forces F1, F2 and F3 acting on the beam.

The beam is in equilibrium.

Which statement is correct?

a)

All the forces are equal in size.

b)

The resultant force on the beam is in the opposite direction to the resultant turning effect.

c)

The resultant force on the beam is zero and the resultant turning effect on the beam is zero.

d)

The total upward force is twice the total downward force.

60.

The point through which the whole weight of the body acts is called

a)

Inertial Point

b)

Center of gravity

c)

Centriod

d)

Central point

61.

Center of gravity of an object depends on it's

a)

weight

b)

mass

c)

density

d)

shape

62.

The center of gravity of the bolt in the picture is in the center of the bolt at the level of the arrow. As it sits on the desk, it is in a(n) ___________________________ position with respect to its center of gravity.

a)

neutral

b)

stable

c)

unstable

d)

irreversible

63.

The center of gravity of the bolt in the picture is in the center of the bolt at the level of the arrow. As it sits on the desk, it is in a(n) ___________________________ position with respect to its center of gravity.

a)

neutral

b)

stable

c)

unstable

d)

irreversible

64.

What is the moment acting on the seesaw?

a)

1.6Nm

b)

15Nm

c)

16N

d)

4Nm

65.

A horse gallops around a circular arena. The centripetal force on the horse is ___.

a)

directed outward

b)

tension

c)

directed toward the center of the arena

d)

9.8 N

66.

What relationship exists between the radius of a circle and the centripetal acceleration?

a)

direct

b)

inverse

c)

exponential

d)

inverse squared

67.

Which of the following is the unit for centripetal force?

a)

J

b)

m/s²

c)

kg⋅m/s

d)

N

68.

What is the relationship between centripetal force and the mass of an object?

a)

direct

b)

inverse

c)

exponential

d)

inverse squared

69.

Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weighs .12 kg and her arm is .65 meters long.

a)

.38

b)

1.23

c)

.55

d)

1.66 N

70.

When an object is in circular motion it is constantly changing its velocity.

a)

True

b)

False

71.

The centripetal force of satellites is similar to gravitational force because they are both a net force towards the center of earth.

a)

True

b)

False

72.

If centripetal force stopped acting on all satellites they would continue traveling in space in a constant direction and constant speed.

a)

True

b)

False

73.

If the velocity of a car traveling around a circular track doubles, its centripetal acceleration would be

a)

1/2 as great

b)

1/4 as great

c)

2 times greater

d)

4 times greater

74.

An unbalanced force of 40 Newtons keeps a 5 kilogram object traveling in a circle of radius 2 meters. What is the speed of the object?

a)

8 m/s

b)

16 m/s

c)

2 m/s

d)

4 m/s

75.

If a rubber stopper completes 20 revolutions in 10 seconds, what is the period?

a)

0.5 s

b)

2 s

c)

10 s

d)

20 s

76.

As distance between two objects increase the pull of gravity

a)

Increases

b)

Decreases

c)

Stays the same

77.

Two factors effecting the strength of gravity between 2 objects are...

a)

weight and mass

b)

distance and weight

c)

mass and matter

d)

mass and distance

78.

As mass increases, what happens to gravitational force?

a)

increases

b)

decreases

c)

stays the same

d)

i don't know

79.

What is the Universal law of gravitation equation?

a)

G=F ⋅ m⋅m2/r²

b)

F=G ⋅ m⋅m₂/(r)²

c)

F=G ⋅ r²/m⋅m₂

d)

G=F ⋅ r²/m⋅m₂

80.

Gravity attracts all objects towards one another.

a)

False

b)

True

c)

It depends

81.

Formula for weight is

a)

$F_g=mg$

b)

$F_g=\frac{GMm}{r^2}$

c)

$F_g=mG$

d)

$F_g=\ m$

82.

Calculate the gravitational force between two objects when they are 0.750m apart. Each object has a mass of 5.00kg.

a)

2.96x10^-7N

b)

3.00x10^-6N

c)

2.22x10^-9N

d)

2.23x10^-8N

83.

What is the gravitational force between two identical 50,000 kg asteroids whose centers of mass are separated by 1000 m?

a)

2500 N

b)

3.3 x 10^-12 N

c)

1.67 x 10^-4 N

d)

1.67 x 10^-7 N

84.

Two spherical objects have masses of 8000 kg and 1500 kg. Their centers are separated by a distance of 1.5 m. Find the gravitational attraction between them

a)

5.4 X 10^-4 N

b)

1.2 X 10⁷ N

c)

3.6 X 10^-4 N

d)

5.33 N

85.

What states that "every object in the universe attracts every other object"?

a)

Law of Universal Gravitation

b)

Newton's First Law of Motion

c)

My mother

d)

Inertia & gravity

86.

Force of gravity is directly proportional to

a)

Mass

b)

Weight

c)

Distance

d)

Time

87.

Find the distance between two objects whose masses are m₁ = 4,500 kg, and m₂= 8,700 kg; if the gravitational force between them is F = 2.0 x 10^-8 N.

a)

130565.25 m

b)

361.34 m

c)

0.19575 m

d)

0.783 m

88.

What is the value of gravitation constant...

a)

$3\times10^8\ ms^{-1}$

b)

$6.67\ \times10^{-11}\ Nm^2kg^{-2}$

c)

$6.63\times10^{-9\ }Nm^2$

89.

A inversely proportional relationship between two parts of an equation means:

a)

One part grabs the top part of a halfpipe and stands upside down on a skateboard or snowboard

b)

One part is quiet, kinda keeps to themselves, isn't really outgoing to socialize with others, but is okay with it all and is more comfortable in smaller group settings.

c)

If one increases in value, the other decreases in value

d)

If one increases in value, the other increases in value

90.

Which diagram best shows the gravitational interaction between Earth and a satellite?

a)

b)

c)

d)

Physics mid term revision

Total questions: 90

Worksheet time: 1hrs 28mins

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