1
Physics- Test 2 Questions with Detailed Verified Answers
(100% Correct Answers) /Already Graded A+
A man walks 56 km exactly southeast in a field before turning around and
walking 76 km to the north. Which of the following vectors represents the
man's total displacement?
Ans: 43 km at 22.5 degrees north of east- this is the only problem that walks
northeast, so draw the problem out
The gravitational force between two bodies can be calculated using Fg =
Gm₁m₂/R² where G is Newton's gravitational constant. Which of the following
is the correct unit of G?
Ans: Nm²/kg²
Each of the following waves is a transverse wave EXCEPT one. Which one is
the EXCEPTION?
A. Ripples on the surface of the water [26%]
B. A wave traveling on a string [16%]
C. A sound wave [42%]
D. Radio waves [16%]
Ans: A transverse wave is one in which all points on the wave oscillate in a
direction perpendicular to the wave's direction. All the waves listed above are
transverse waves fitting that definition except for a sound wave, which is a
longitudinal wave. A longitudinal wave is one in which particles of the medium
through which the wave is transported vibrate parallel to the sound wave's
direction.
so the answer is a sound wave that is the exception
What is the focal length of a concave mirror with a radius of curvature of
90cm?
Ans: 45 cm in front of the mirror
Approved By:
vPretest - Stuvia US
, 2
A weightless rod is balanced on a fulcrum. An 80g mass is hung 40 cm to the
left of the fulcrum. What mass m2 would you need to hang 25 cm to the right
of the fulcrum to balance the system?
Ans: 128 grams
In which of the following scenarios will a person standing on a scale in an
elevator feel heavier?
Ans: When the elevator is accelerating upward at 4 m/s^2
A bullet with a mass of 25 grams is traveling at a speed of 250 m/s. The bullet
encounters a 35-kg wooden block at rest and upon impact, gets embedded
within the block. What is the velocity with which the objects move together
after the collision?
Ans: V(a+b)f=mavai/(ma+mb)
A ball is rolled off a horizontal table with a velocity, v. If the table has a height
which of the following represents the distance that the ball will land from the
table when it hits the ground?
Ans: V x Sqrt 2h/g
A girl throws a basketball straight up in the air. Which of the following
statements is true about the ball while it is in the air?
Ans: The velocity and acceleration of the ball are in the same direction while
the ball is on its way down
What happens to the beam of light as it moves from the air (n=1.00) to water
(n=1.33)?
Ans: The speed decreases and light bends towards the normal.Speed of light
v=c/n
Which of the following statements is true about electromagnetic waves?
Ans: Electromagnetic waves do not require material mediums to propagate
Approved By:
vPretest - Stuvia US
Physics- Test 2 Questions with Detailed Verified Answers
(100% Correct Answers) /Already Graded A+
A man walks 56 km exactly southeast in a field before turning around and
walking 76 km to the north. Which of the following vectors represents the
man's total displacement?
Ans: 43 km at 22.5 degrees north of east- this is the only problem that walks
northeast, so draw the problem out
The gravitational force between two bodies can be calculated using Fg =
Gm₁m₂/R² where G is Newton's gravitational constant. Which of the following
is the correct unit of G?
Ans: Nm²/kg²
Each of the following waves is a transverse wave EXCEPT one. Which one is
the EXCEPTION?
A. Ripples on the surface of the water [26%]
B. A wave traveling on a string [16%]
C. A sound wave [42%]
D. Radio waves [16%]
Ans: A transverse wave is one in which all points on the wave oscillate in a
direction perpendicular to the wave's direction. All the waves listed above are
transverse waves fitting that definition except for a sound wave, which is a
longitudinal wave. A longitudinal wave is one in which particles of the medium
through which the wave is transported vibrate parallel to the sound wave's
direction.
so the answer is a sound wave that is the exception
What is the focal length of a concave mirror with a radius of curvature of
90cm?
Ans: 45 cm in front of the mirror
Approved By:
vPretest - Stuvia US
, 2
A weightless rod is balanced on a fulcrum. An 80g mass is hung 40 cm to the
left of the fulcrum. What mass m2 would you need to hang 25 cm to the right
of the fulcrum to balance the system?
Ans: 128 grams
In which of the following scenarios will a person standing on a scale in an
elevator feel heavier?
Ans: When the elevator is accelerating upward at 4 m/s^2
A bullet with a mass of 25 grams is traveling at a speed of 250 m/s. The bullet
encounters a 35-kg wooden block at rest and upon impact, gets embedded
within the block. What is the velocity with which the objects move together
after the collision?
Ans: V(a+b)f=mavai/(ma+mb)
A ball is rolled off a horizontal table with a velocity, v. If the table has a height
which of the following represents the distance that the ball will land from the
table when it hits the ground?
Ans: V x Sqrt 2h/g
A girl throws a basketball straight up in the air. Which of the following
statements is true about the ball while it is in the air?
Ans: The velocity and acceleration of the ball are in the same direction while
the ball is on its way down
What happens to the beam of light as it moves from the air (n=1.00) to water
(n=1.33)?
Ans: The speed decreases and light bends towards the normal.Speed of light
v=c/n
Which of the following statements is true about electromagnetic waves?
Ans: Electromagnetic waves do not require material mediums to propagate
Approved By:
vPretest - Stuvia US
