A 2.0-kg block slides on a frictionless 15 inclined plane. A force acting parallel to the incline is applied to the block. The acceleration of the block is 1.5 m/s2 down the incline. What is the applied force?
a. 8.1 N down the incline
b. 3.0 N down the incline
c. 2.1 N up the incline
d. 3.0 N up the incline
e. 8.1 N up the incline
[Ques. 2] The figure shows a snapshot of four different waves in identical ropes stretched with the same force.
The wave with the largest wavelength is wave
a.
I.
b.
II.
c.
III.
d.
IV.
e.
all of the above
[Ques. 3] A 2.0-kg block slides on a frictionless 25 inclined plane. A force of 4.6 N acting parallel to the incline and up the incline is applied to the block. What is the acceleration of the block?
a. 1.8 m/s2 up the incline
b. 2.3 m/s2 up the incline
c. 6.6 m/s2 down the incline
d. 1.8 m/s2 down the incline
e. 2.3 m/s2 down the incline
[Ques. 4] A 3.0-kg block slides on a frictionless 20 inclined plane. A force of 16 N acting parallel to the incline and up the incline is applied to the block. What is the acceleration of the block?
a. 2.0 m/s2 down the incline
b. 5.3 m/s2 up the incline
c. 2.0 m/s2 up the incline
d. 3.9 m/s2 down the incline
e. 3.9 m/s2 up the incline
[Ques. 5] 
Which of these shows one cycle of the wave?
a.
b.
c.
d.
[Ques. 6] A person weighing 0.70 kN rides in an elevator that has an upward acceleration of 1.5 m/s2 . What is the magnitude of the force of the elevator floor on the person?
a. 0.11 kN
b. 0.81 kN
c. 0.70 kN
d. 0.59 kN
e. 0.64 kN
[Ques. 7] A 5.0-kg mass is suspended by a string from the ceiling of an elevator that is moving upward with a speed which is decreasing at a constant rate of 2.0 m/s in each second. What is the tension in the string supporting the mass?
a. 49 N
b. 39 N
c. 59 N
d. 10 N
e. 42 N
[Ques. 8] The wavelength of the wave shown in this figure is about
a.
2 m.
b.
1.75 m.
c.
0.33 m.
d.
not defined.
e.
slightly over 5 m.
[Ques. 9] A 5.0-kg mass is attached to the ceiling of an elevator by a rope whose mass is negligible. What force does the mass exert on the rope when the elevator has an acceleration of 4.0 m/s2 upward?
a. 69 N downward
b. 29 N downward
c. 49 N downward
d. 20 N downward
e. 19 N downward
[Ques. 10] The tension in a string from which a 4.0-kg object is suspended in an elevator is equal to 44 N. What is the acceleration of the elevator?
a. 11 m/s2 upward
b. 1.2 m/s2 upward
c. 1.2 m/s2 downward
d. 10 m/s2 upward
e. 2.4 m/s2 downward
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