Physics 1st Semester

Final Practice Questions

Two forces, F1 and F2, are applied to a block on a

frictionless, horizontal surface as shown below.

If the magnitude of the block’s acceleration is

2.0 meters per second2, what is the mass of the

block?

A) 1 kg C) 6 kg

B) 5 kg D) 7 kg

On a highway, a car is driven 80. kilometers

during the first 1.00 hour of travel,

50. kilometers during the next 0.50 hour, and

40. kilometers in the final 0.50 hour. What is the

car’s average speed for the entire trip?

A) 45 km/h C) 85 km/h

B) 60. km/h D) 170 km/h

What is the weight of a 2.00-kilogram object on the surface of Earth?

A) 4.91 N C) 9.81 N

B) 2.00 N D) 19.6 N

The gravitational potential energy, with respect to Earth, that is possessed by an object is dependent on the object’s

A) acceleration C) position

B) momentum D) speed

Which type of wave requires a material medium through which to travel?

A) sound C) visible light

B) radio D) x-ray

The diagram below shows two pulses

approaching each other in a uniform

medium.

Which diagram best represents the superposition of the two pulses?

A) B)

C) D)

When Earth and the Moon are separated by a

distance of 3.84 × 108 meters, the magnitude of

the gravitational force of attraction between

them is 2.0 × 1020 newtons. What would be the

magnitude of this gravitational force of attraction

if Earth and the Moon were separated by a

distance of 1.92 × 108 meters?

A) 5.0 × 1019 N C) 4.0 × 1020 N

B) 2.0 × 1020 N D) 8.0 × 1020 N

The work done in lifting an apple one meter

near Earth’s surface is approximately

A) 1 J C) 100 J

B) 0.01 J D) 1000 J

A force of 25 newtons east and a force of

25 newtons west act concurrently on a

5.0-kilogram cart. What is the acceleration of

the cart?

A) 1.0 m/s2 west C) 5.0 m/s2 east

B) 0.20 m/s2 east D) 0 m/s2

What is the acceleration due to gravity at a

location where a 15.0-kilogram mass weighs

45.0 newtons?

A) 675 m/s2 C) 3.00 m/s2

B) 9.81 m/s2 D) 0.333 m/s2

If the speed of a moving object is doubled, the kinetic energy of the object is

A) halved C) unchanged

B) doubled D) quadrupled

Which situation describes a system with

decreasing gravitational potential energy?

A) a girl stretching a horizontal spring

B) a bicyclist riding up a steep hill

C) a rocket rising vertically from Earth

D) a boy jumping down from a tree limb

How much work is required to lift a 10.-newton weight from 4.0 meters to 40. meters above the surface of Earth?

A) 2.5 J C) 3.6 × 102 J

B) 3.6 J D) 4.0 × 102 J

A television remote control is used to direct

pulses of electromagnetic radiation to a receiver

on a television. This communication from the

remote control to the television illustrates that

electromagnetic radiation

A) is a longitudinal wave

B) possesses energy inversely proportional to

its frequency

C) diffracts and accelerates in air

D) transfers energy without transferring mass

A ray of light traveling in air is incident at an

angle of 40.° on an air-crown glass (n= 1.5)

interface as shown below.

What is the angle of refraction for this light ray?

A) 25° C) 40°

B) 57° D) 78°

The diagram below shows an object moving counterclockwise

around a horizontal, circular track.

Which diagram represents the direction of both the object’s

velocity and the centripetal force acting on the object when

it is in the position shown?

A) B)

C) D)

A carpenter hits a nail with a hammer. Compared

to the magnitude of the force the hammer exerts

on the nail, the magnitude of the force the nail

exerts on the hammer during contact is

A) less

B) greater

C) the same

As a meteor moves from a distance of 16 Earth radii to a distance of 2 Earth radii from the center of Earth, the magnitude of the gravitational force between the meteor and Earth becomes

A) as great C) 64 times as great

B) 8 times as great D) 4 times as great

The diagram below represents a transverse

wave.

The wavelength of the wave is equal to the distance between points

A) A and G C) C and E

B) B and F D) D and F

A 25-newton horizontal force northward and a

35-newton horizontal force southward act

concurrently on a 15-kilogram object on a

frictionless surface. What is the magnitude of

the object’s acceleration?

A) 0.67 m/s2 C) 2.3 m/s2

B) 1.7 m/s2 D) 4.0 m/s2

A car rounds a horizontal curve of constant

radius at a constant speed. Which diagram best represents the directions of both the car’s velocity, v, and acceleration, a?

A) B)

C) D)

The work done on a slingshot is 40.0 joules to

pull back a 0.10-kilogram stone. If the slingshot

projects the stone straight up in the air, what is

the maximum height to which the stone will rise?

[Neglect friction.]

A) 0.41 m C) 410 m

B) 41 m D) 4.1 m

If a 65-kilogram astronaut exerts a force with a

magnitude of 50. newtons on a satellite that she

is repairing, the magnitude of the force that the

satellite exerts on her is

A) 0 N

B) 50. N less than her weight

C) 50. N more than her weight

D) 50. N

A periodic wave having a frequency of 5.0 hertz and a speed of 10. meters per second has a wavelength of

A) 0.50 m C) 5.0 m

B) 2.0 m D) 50. m

Two pulses traveling in the same uniform

medium approach each other, as shown in the diagram below.

Which diagram best represents the

superposition of the two pulses?

A) B)

C) D)

A car moves with a constant speed in a clockwise direction around a circular path of radius r, as represented in the diagram below.

When the car is in the position shown, its

acceleration is directed toward the

A) north C) south

B) west D) east

The table below lists the mass and speed of each of four objects.

Data Table

Which two objects have the same kinetic

energy?

A) A and D C) A and C

B) B and D D) B and C

Which type of wave requires a material medium through which to travel?

A) electromagnetic C) sound

B) infrared D) radio

The work done in accelerating an object along a frictionless horizontal surface is equal to the change in the object’s

A) momentum C) potential energy

B) velocity D) kinetic energy

As a block slides across a table, its speed

decreases while its temperature increases.

Which two changes occur in the block’s energy

as it slides?

A) a decrease in kinetic energy and an increase

in internal energy

B) an increase in kinetic energy and a decrease

in internal energy

C) a decrease in both kinetic energy and internal

energy

D) an increase in both kinetic energy and internal

energy

A ringing bell is located in a chamber. When the

air is removed from the chamber, why can the

bell be seen vibrating but not be heard?

A) Light waves can travel through a vacuum,

but sound waves cannot.

B) Sound waves have greater amplitude than

light waves.

C) Light waves travel slower than sound waves.

D) Sound waves have higher frequency than

light waves.

As a transverse wave travels through a medium, the individual particles of the medium move

A) perpendicular to the direction of wave travel

B) parallel to the direction of wave travel

C) in circles

D) in ellipses

A straight glass rod appears to bend when placed

in a beaker of water, as shown in the diagram

below.

What is the best explanation for this

phenomenon?

A) The water is warmer than the air.

B) Light travels faster in water than in air.

C) Light is reflected at the air-water interface.

D) Light is refracted as it crosses the air-water

interface.

During an emergency stop, a 1.5 × 103 kilogram car lost a total of 3.0 × 105 joules of kinetic energy. What was the speed of the car at the moment the brakes were applied?

A) 10. m/s C) 20. m/s

B) 14 m/s D) 25 m/s

A person observes a fireworks display from a safe

distance of 0.750 kilometer. Assuming that

sound travels at 340. meters per second in air,

what is the time between the person seeing and

hearing a fireworks explosion?

A) 0.453 s C) 410. s

B) 2.21 s D) 2.55 × 105 s

The diagram below represents straight wave fronts

passing from deep water into shallow water, with

a change in speed and direction.

Which phenomenon is illustrated in the diagram?

A) reflection C) diffraction

B) refraction D) interference

An earthquake wave is traveling from west to east through rock. If the particles of the rock are vibrating in a north-south direction, the wave must be classified as

A) transverse C) a microwave

B) longitudinal D) a radio wave

A 3.0-kilogram steel block is at rest on a frictionless horizontal surface. A 1.0-kilogram lump of clay is propelled horizontally at 6.0 meters per second toward the block as shown in the diagram below.

Upon collision, the clay and steel block stick

together and move to the right with a speed of

A) 1.5 m/s C) 3.0 m/s

B) 2.0 m/s D) 6.0 m/s

A 512-hertz sound wave travels 331. m/s to an observer through air at STP. What is the wavelength of this sound wave?

(1) 0.195 m (3) 1.55 m

(2) 0.646 m (4) 5.12 m

In the diagram below, which shows a 1.0-newton metal disk resting on an index card that is balanced on top of a glass.

What is the net force acting on the disk?

(1) 1.0 N (3) 0 N

(2) 2.0 N (4) 9.8 N

When the index card is quickly pulled away from the glass in a horizontal direction, the disk falls straight down into the glass. This action is a result of the disk’s

(1) inertia (3) shape

(2) charge (4) temperature

A 25.0-kilogram space probe fell freely with an acceleration of 2.00 meters per second2 just before it landed on a distant planet. What is the weight of the space probe on that planet?

(1) 12.5 N (3) 50.0 N

(2) 25.0 N (4) 250. N

A 400-newton girl standing on a dock exerts a force of 100 newtons on a 10 000-newton sailboat as she pushes it away from the dock. How much force does the sailboat exert on the girl?

(1) 25 N (3) 400 N

(2) 100 N (4) 10 000 N

The diagram below represents two satellites of

equal mass, A and B, in circular orbits around a

planet.

Compared to the magnitude of the gravitational

force of attraction between satellite A and the

planet, the magnitude of the gravitational force of

attraction between satellite B and the planet is

(1) half as great (2) twice as great

(3) one-fourth as great (4) four times as great

Through what vertical distance is a 50.-newton object moved if 250 joules of work is done against the gravitational field of Earth?

(1) 2.5 m (3) 9.8 m

(2) 5.0 m (4) 25 m

The diagram below represents shallow water waves of constant wavelength passing through two small openings, A and B, in a barrier.

Which statement best describes the interference at point P?

(1) It is constructive, and causes a longer wavelength.

(2) It is constructive, and causes an increase in amplitude.

(3) It is destructive, and causes a shorter wavelength.

(4) It is destructive, and causes a decrease in amplitude.

In the diagram below, a cart travels clockwise at

constant speed in a horizontal circle.

At the position shown in the diagram, which

arrow indicates the direction of the centripetal

acceleration of the cart?

(1) A (3) C

(2) B (4) D