All Pre- & Post-Lab Quizzes For PH 114 With Complete
Questions And Answers 100% Pass
Two objects of the same mass fall from different heights. If air friction is negligible then they
will land on the ground...
- at the same time, speed, and acceleration
- at the same time and speed but different accelerations
- at the same time but different speeds and accelerations
- at different speeds, times but the same acceleration - ANSWER at different speeds, times but
the same acceleration
A projectile of mass m₁ is launched horizontally from a height of 100 m and speed 10 m/s.
Another projectile of mass m₂ free falls from the same height. The experiment is taking place
on Mars, where the gravity is about ½ of that of Earth. Atmospheric resistance can be
neglected. The two projectiles will land on the ground...
- at the same time
- at different times
- can be either or, depending on their masses - ANSWER at the same time
A projectile has a velocity of 3t (i) - t² (j), where t is the time in seconds and (i) and (j) are the
unit vectors for the x- and y-axes. At t=2s, its total acceleration magnitude will be...
- 8 m/s²
- 7 m/s²
,- 6 m/s²
- 5 m/s² - ANSWER 5 m/s²
An object is left to slide without friction from the top of an inclined plane of angle (z). The
object is accelerating with...
- g sin(z)
- no acceleration
- g cos(z)
- g - ANSWER g sin(z)
A mass of 1 kg is at rest on a horizontal surface with friction coefficient µ. When a horizontal
force of 5 N is applied to the object then it barely moves. If g = 9.8 m/s², then µ is about...
- 0.1
- 0.3
- 0.5
- 0.7 - ANSWER 0.5
One claims that two springs connected in parallel to each other will exhibit a greater constant
than if the same two springs were connected in series. This statement is likely...
- correct
- incorrect - ANSWER correct
, An object of mass m is attached to a spring that is on an inclined plane of angle (z). The
object is at rest. If the spring is elongated by x then one can argue that the spring's constant k
will be equal to...
- mg / x
- mg sin(z) / x
- mg cos(z) / x
- none of these - ANSWER mg sin(z) / x
A student calculates the friction coefficient between an object and a horizontal surface. The
student argues that this coefficient should be the same if the experiment takes place between
the same object and the same surface but inclined. The student's argument is...
- correct
- incorrect - ANSWER correct
What you measured as acceleration (m/s²) with the cart going down the inclined rail of angle
(x) was a value close to...
- 9.8 sin(x)
- 9.8 cos(x)
- 9.8
- none of these - ANSWER 9.8 sin(x)
A student argues that in reality, the contact area of an object resting on a horizontal surface
has to do with the friction coefficient. This argument is...
Questions And Answers 100% Pass
Two objects of the same mass fall from different heights. If air friction is negligible then they
will land on the ground...
- at the same time, speed, and acceleration
- at the same time and speed but different accelerations
- at the same time but different speeds and accelerations
- at different speeds, times but the same acceleration - ANSWER at different speeds, times but
the same acceleration
A projectile of mass m₁ is launched horizontally from a height of 100 m and speed 10 m/s.
Another projectile of mass m₂ free falls from the same height. The experiment is taking place
on Mars, where the gravity is about ½ of that of Earth. Atmospheric resistance can be
neglected. The two projectiles will land on the ground...
- at the same time
- at different times
- can be either or, depending on their masses - ANSWER at the same time
A projectile has a velocity of 3t (i) - t² (j), where t is the time in seconds and (i) and (j) are the
unit vectors for the x- and y-axes. At t=2s, its total acceleration magnitude will be...
- 8 m/s²
- 7 m/s²
,- 6 m/s²
- 5 m/s² - ANSWER 5 m/s²
An object is left to slide without friction from the top of an inclined plane of angle (z). The
object is accelerating with...
- g sin(z)
- no acceleration
- g cos(z)
- g - ANSWER g sin(z)
A mass of 1 kg is at rest on a horizontal surface with friction coefficient µ. When a horizontal
force of 5 N is applied to the object then it barely moves. If g = 9.8 m/s², then µ is about...
- 0.1
- 0.3
- 0.5
- 0.7 - ANSWER 0.5
One claims that two springs connected in parallel to each other will exhibit a greater constant
than if the same two springs were connected in series. This statement is likely...
- correct
- incorrect - ANSWER correct
, An object of mass m is attached to a spring that is on an inclined plane of angle (z). The
object is at rest. If the spring is elongated by x then one can argue that the spring's constant k
will be equal to...
- mg / x
- mg sin(z) / x
- mg cos(z) / x
- none of these - ANSWER mg sin(z) / x
A student calculates the friction coefficient between an object and a horizontal surface. The
student argues that this coefficient should be the same if the experiment takes place between
the same object and the same surface but inclined. The student's argument is...
- correct
- incorrect - ANSWER correct
What you measured as acceleration (m/s²) with the cart going down the inclined rail of angle
(x) was a value close to...
- 9.8 sin(x)
- 9.8 cos(x)
- 9.8
- none of these - ANSWER 9.8 sin(x)
A student argues that in reality, the contact area of an object resting on a horizontal surface
has to do with the friction coefficient. This argument is...
