Physics Regents Practice Questions

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Question 1 of 31

Which term identifies a scalar quantity?

Select one of the following:

displacement
time
momentum
velocity

Explanation

Question 2 of 31

Two 20.-newton forces act concurrently on an object. What angle between these forces will produce a resultant force with the greatest magnitude?

Select one of the following:

0°
45°
90°
180°

Explanation

Question 3 of 31

The centripetal force acting on the space shuttle as it orbits Earth is equal to the shuttle’s

Select one of the following:

momentum
inertia
velocity
weight

Explanation

Question 4 of 31

An 8.0-newton wooden block slides across a horizontal wooden floor at constant velocity. What is the magnitude of the force of kinetic friction between the block and the floor?

Select one of the following:

3.0 N
8.0 N
2.4 N
5.0 N

Explanation

Question 5 of 31

A particle could have a charge of

Select one of the following:

0.8×10^−19 C
1.2×10^−19 C
3.2×10^−19 C
4.1×10−19 C

Explanation

Question 6 of 31

A rock is thrown straight up into the air. At the highest point of the rock’s path, the magnitude of the net force acting on the rock is

Select one of the following:

less than the magnitude of the rock’s weight, but greater than zero
greater than the magnitude of the rock’s weight
the same as the magnitude of the rock’s weight
zero

Explanation

Question 7 of 31

An object accelerates uniformly from 3.0 meters per second east to 8.0 meters per second east in 2.0 seconds. What is the magnitude of the acceleration of the object?

Select one of the following:

2.5 m/s^2
5.0 m/s^2
5.5 m/s^2
3.0 m/s^2

Explanation

Question 8 of 31

An object accelerates uniformly from 3.0 meters per second east to 8.0 meters per second east in 2.0 seconds. What is the magnitude of the acceleration of the object?

Select one of the following:

2.5 m/s^2
5.0 m/s^2
5.5 m/s^2
3.0 m/s^2

Explanation

Question 9 of 31

As a box is pushed 30. meters across a horizontal floor by a constant horizontal force of 25 newtons, the kinetic energy of the box increases by 300. joules. How much total internal energy is produced during this process?

Select one of the following:

150 J
450 J
250 J
750 J

Explanation

Question 10 of 31

A baseball is thrown at an angle of 40.0° above the horizontal. The horizontal component of the baseball’s initial velocity is 12.0 meters per second. What is the magnitude of the ball’s initial velocity?

Select one of the following:

7.71 m/s
9.20 m/s
15.7 m/s
18.7 m/s

Explanation

Question 11 of 31

As shown in the diagram, an open box and its contents have a combined mass of 5.0 kilograms. A horizontal force of 15 newtons is required to push the box at a constant speed of 1.5 meters per second across a level surface. The inertia of the box and its contents increases if there is an increase in the

Select one of the following:

speed of the box
mass of the contents of the box
magnitude of the horizontal force applied to the box
coefficient of kinetic friction between the box and the level surface

Explanation

Question 12 of 31

A number of 1.0-newton horizontal forces are exerted on a block on a frictionless, horizontal surface. Which top-view diagram shows the forces producing the greatest magnitude of acceleration of the block?

Select one of the following:

Explanation

Question 13 of 31

A car uses its brakes to stop on a level road. During this process, there must be a conversion of kinetic energy into

Select one of the following:

light energy
nuclear energy
internal energy
gravitational potential energy

Explanation

Question 14 of 31

When a teacher shines light on a photocell attached to a fan, the blades of the fan turn. The brighter the light shone on the photocell, the faster the blades turn. Which energy conversion is illustrated by this demonstration?

Select one of the following:

light → thermal → mechanical
light → nuclear → thermal
light → electrical → mechanical
light → mechanical → chemical

Explanation

Question 15 of 31

Two electrons are separated by a distance of 3.00 × 10−6 meter. What are the magnitude and direction of the electrostatic forces each exerts on the other?

Select one of the following:

2.56 × 10^−17 N away from each other
2.56 × 10^−17 N towards each other
7.67 × 10^−23 N away from each other
7.67 × 10^−23 N towards each other

Explanation

Question 16 of 31

Two electrons are separated by a distance of 3.00 × 10−6 meter. What are the magnitude and direction of the electrostatic forces each exerts on the other?

Select one of the following:

2.56 × 10^−17 N away from each other
2.56 × 10^−17 N towards each other
7.67 × 10^−23 N away from each other
7.67 × 10^−23 N towards each other

Explanation

Question 17 of 31

Moving a length of copper wire through a magnetic field may cause the wire to have a

Select one of the following:

potential difference across it
lower temperature
lower resistivity
higher resistance

Explanation

Question 18 of 31

A sound wave traveling eastward through air causes the air molecules to

Select one of the following:

vibrate east and west
vibrate north and west
move eastward, only
move northward, only

Explanation

Question 19 of 31

Which particles are not affected by the strong force?

Select one of the following:

hadrons
protons
electrons
neutrons

Explanation

Question 20 of 31

A photon is emitted as the electron in a hydrogen atom drops from the n = 5 energy level directly to the n = 3 energy level. What is the energy of the emitted photon?

Select one of the following:

0.85 eV
0.97 eV
1.05 eV
2.01 eV

Explanation

Question 21 of 31

In the diagram, a stationary source located at point S produces sound having a constant frequency of 512 hertz. Observer A, 50. meters to the left of S, hears a frequency of 512 hertz. Observer B, 100. meters to the right of S, hears a frequency lower than 512 hertz. Which statement best describes the motion of the observers?

Select one of the following:

Observer A is moving toward point S, and observer B is stationary.
Observer A is moving away from point S,and observer B is stationary.
Observer A is stationary, and observer B is moving toward point S.
Observer A is stationary, and observer B is moving away from point S.

Explanation

Question 22 of 31

Which graph represents the relationship between the magnitude of the gravitational force exerted by Earth on a spacecraft and the distance between the center of the spacecraft and center of Earth? [Assume constant mass for the spacecraft.]

Select one of the following:

Explanation

Question 23 of 31

The diagram represents a circuit consisting of two resistors connected to a source of potential difference. What is the current through the 20.-ohm resistor?

Select one of the following:

0.25 A
6.0 A
4.0 A
1.2 A

Explanation

Question 24 of 31

A ray of light ( f = 5.09 × 1014 Hz) travels through various substances. Which graph best represents the relationship between the absolute index of refraction of these substances and the corresponding speed of light in these substances?

Select one of the following:

Explanation

Question 25 of 31

A 4.0-kilogram object is accelerated at 3.0 meters per second^2 north by an unbalanced force. The same unbalanced force acting on a 2.0-kilogram object will accelerate this object toward the north at

Select one of the following:

12 m/s^2
6 m/s^2
3 m/s^2
1.5 m/s^2

Explanation

Question 26 of 31

When two point charges of magnitude q1 and q2 are separated by a distance, r, the magnitude of the electrostatic force between them is F. What would be the magnitude of the electrostatic force between point charges 2q1 and 4q2 when separated by a distance of 2r?

Select one of the following:

Explanation

Question 27 of 31

In a process called pair production, an energetic gamma ray is converted into an electron and a positron. It is not possible for a gamma ray to be converted into two electrons because

Select one of the following:

charge must be conserved
momentum must be conserved
mass-energy must be conserved
baryon number must be conserved

Explanation

Question 28 of 31

The diagram shows a series of wave fronts approaching an opening in a barrier. Point P is located on the opposite side of the barrier. The wave fronts reach point P as a result of

Select one of the following:

resonance
refraction
reflection
diffraction

Explanation

Question 29 of 31

Which particle would produce a magnetic field?

Select one of the following:

a neutral particle moving in a straight line
a neutral particle moving in a circle
a stationary charged particle
a moving charged particle

Explanation

Question 30 of 31

Which diagram represents the electric field between two oppositely charged conducting spheres?

Select one of the following:

Explanation

Question 31 of 31

Which diagram represents the electric field between two oppositely charged conducting spheres?

Select one of the following:

Explanation

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