Multiple-Choice Exercise From the New York State Education Department. Regents High School Examination Internet. Available from http://www.nysedregents.org; accessed January 22, 2012.; All rights reserved. No commercial, for-profit use of this material is allowed. E-mail comments and questions to Tami Maloney.
Choose the correct answer for each question.
magnitude, only
direction, only
both magnitude and direction
neither magnitude nor direction
A car travels 90. meters due north in 15 seconds. Then the car turns around and travels 40. meters due south in 5.0 seconds. What is the magnitude of the average velocity of the car during this 20.-second interval?
2.5 m/s
5.0 m/s
6.5 m/s
7.0 m/s
How far will a brick starting from rest fall freely in 3.0 seconds?
15 m
29 m
44 m
88 m
If the sum of all the forces acting on a moving object is zero, the object will
slow down and stop
change the direction of its motion
accelerate uniformly
continue moving with constant velocity
1.0 N
2.0 N
5.0 N
50. N
acceleration due to gravity
universal gravitational constant
momentum of objects
weight of objects
A 1,200-kilogram car traveling at 10. meters per second hits a tree and is brought to rest in 0.10 second. What is the magnitude of the average force acting on the car to bring it to rest?
A spring scale reads 20. newtons as it pulls a 5.0-kilogram mass across a table. What is the magnitude of the force exerted by the mass on the spring scale?
49 N
20. N
5.0 N
4.0 N
toward the center of the circular curve
away from the center of the circular curve
tangent to the curve in the direction of motion
tangent to the curve opposite the direction of motion
decrease
increase
remain the same
The amount of work done against friction to slide a box in a straight line across a uniform, horizontal floor depends most on the
time taken to move the box
distance the box is moved
speed of the box
direction of the box’s motion
1.4 m/s
2.0 m/s
3.0 m/s
3.6 m/s
An object weighs 100. newtons on Earth’s surface. When it is moved to a point one Earth radius above Earth’s surface, it will weigh
25.0 N
50.0 N
100. N
400. N
An object weighing 15 newtons is lifted from the ground to a height of 0.22 meter. The increase in the object’s gravitational potential energy is approximately
310 J
32 J
3.3 J
0.34 J
As an object falls freely, the kinetic energy of the object
decreases
increases
remains the same
24 W
32 W
48 W
96 W
Which graph best represents the electrostatic force between an alpha particle with a charge of +2 elementary charges and a positively charged nucleus as a function of their distance of separation?
When a neutral metal sphere is charged by contact with a positively charged glass rod, the sphere
loses electrons
gains electrons
loses protons
gains protons
If 10. coulombs of charge are transferred through an electric circuit in 5.0 seconds, then the current in the circuit is
0.50 A
2.0 A
15 A
50. A
It is zero at point B.
It is a maximum at point B.
It is a maximum at point C.
It is the same at points A, B, and C.
A periodic wave transfers
energy, only
mass, only
both energy and mass
neither energy nor mass
As the potential difference across a given resistor is increased, the power expended in moving charge through the resistor
decreases
increases
remains the same
An electric iron operating at 120 volts draws 10. amperes of current. How much heat energy is delivered by the iron in 30. seconds?
A motor is used to produce 4.0 waves each second in a string. What is the frequency of the waves?
0.25 Hz
15 Hz
25 Hz
4.0 Hz
A and C
A and D
B and C
C and D
A surfacing whale in an aquarium produces water wave crests having an amplitude of 1.2 meters every 0.40 second. If the water wave travels at 4.5 meters per second, the wavelength of the wave is
1.8 m
2.4 m
3.0 m
11 m
crown glass
flint glass
glycerol
water
A radar gun can determine the speed of a moving automobile by measuring the difference in frequency between emitted and reflected radar waves. This process illustrates
resonance
the Doppler effect
diffraction
refraction
a node resulting from constructive interference
a node resulting from destructive interference
an antinode resulting from constructive interference
an antinode resulting from destructive interference
One watt is equivalent to one
Which pair of forces acting concurrently on an object will produce the resultant of greatest magnitude?
decreases
increases
remains the same
The mass of a high school football player is approximately
A constant force is used to keep a block sliding at constant velocity along a rough horizontal track. As the block slides, there could be an increase in its
gravitational potential energy, only
internal energy, only
gravitational potential energy and kinetic energy
internal energy and kinetic energy
A photon of which electromagnetic radiation has the most energy?
ultraviolet
x ray
infrared
microwave
The spring of a toy car is wound by pushing the car backward with an average force of 15 newtons through a distance of 0.50 meter. How much elastic potential energy is stored in the car’s spring during this process?
1.9 J
7.5 J
30. J
56 J
1.3 A
1.5 A
3.0 A
0.75 A
↑
↓
→
←
Which graph best represents the motion of a block accelerating uniformly down an inclined plane?
smaller
larger
the same
1 A
2 A
3 A
4 A
The diagram below represents a light ray traveling from air to Lucite to medium Y and back into air.
0.333
0.500
0.707
0.886
The diagram below represents a light ray traveling from air to Lucite to medium Y and back into air.
