Please Help assignment was not suppose to be timed but turned out it is.Question 1.1. (TCO 1)
Please Help assignment was not suppose to be timed but turned out it is.Question 1.1. (TCO 1) Which
of the following statements is true for an object with an acceleration vector pointing in the same direction to its velocity vector?
The object is speeding up.
The object is slowing down.
The object can be either speeding up or slowing down.
The displacement of the object must be positive.
None of the above
Question 2.
2. (TCO 2) A flying drone is initially moving at 9 m/s to the left. It then accelerates at 4 m/s2 to the right for 2 s. How far does it travel during the 2 s?
26 m to the right
17 m to the right
10 m to the left
5 m to the left
1 m to the left
Question 3.
3. (TCO 2) A 12 kg mass is suspended by a cord from the ceiling. The magnitude of the tension force exerted on the block by the cord is most nearly _____.
0
9.8 N
12 N
19.6 N
117.6 N
Question 4.
4. (TCO 1) A rock is thrown straight down into a canyon with a speed of 3 m/s and strikes the canyon floor after 1.7 s. Approximately how deep is the canyon?
22.2 m
19.3 m
13.4 m
9.1 m
8.2 m
Question 5.
5. (TCO 2) A hockey puck is sliding on flat ice with an initial speed to 4 m/s and comes to rest after 2 s. What is the approximate coefficient of kinetic friction between the puck and the ice?
0.9
0.6
0.5
0.4
0.2
Question 6.
6. (TCO 1) A man walks a total distance of 6 km at a heading of 38 degrees north of west. Approximately how far west is the man from where he started?
6.0 km
5.47 km
4.73 km
4.02 km
3.69 km
Question 7.
7. (TCO 2) A book is sitting on a table. According to Newton’s third law, which two forces create an action-reaction pair?
The normal force of the table on the book and the gravitational force on the book
The normal force on the book from the table and the normal force on the table from the book
The normal force of the book on the table and the gravitational force on the table
The gravitational force on the table and the gravitational force on the book
None of the above
Question 8.
8. (TCO 2) A force with a magnitude of 180 N accelerates a satellite with a mass of 225 kg. What is the approximate magnitude of the acceleration of the satellite?
40,500 m/s2
1.25 m/s2
0.8 m/s2
0.2 m/s2
0.1 m/s2
Question 9.
9. (TCO 1) A tractor (T) is pulling three trailers, M1, M2, and M3. Assume there is no friction acting. The tractor and trailers are accelerating at 2.5 m/s2. If M1 = 400 kg, M2 = 200 kg, and M3 = 100 kg, find the tension in the connection between the following.
M3__M2___M1__T
(a) M2 and M3
(b) M2 and M1
(c) M1 and T
Question 10.
10. (TCO 2) Four dogs are pulling a sled across a flat patch of snow. The total force exerted by the dogs is 475 N, applied horizontally. The sled (with the driver on it) has a mass of 350 kg and the coefficient of kinetic friction between the sled and the ground is
(a) What is the normal force on the sled (with the driver)?
(b) What is the force of friction on the sled (with the driver)?
(c) Determine the acceleration of the sled.
Question 11.
11. (TCO 1) A projectile is fired at an angle of 30° above horizontal with an initial speed vi = 55 m/s on the moon, where the acceleration due to gravity is approximately 1/6 the acceleration due to gravity on the earth’s surface. Assume the projectile leaves the gun at ground level.
(a) How long does it take the projectile to strike the ground?
(b) How far from the base of the gun does the projectile hit the ground?
(c) Determine the correct answer. The speed of the projectile _____.
(a) Determine the time from yi = 0 to yf = 0.
b) is greatest just before it hits the ground
c) is greatest at its maximum height
d) is constant throughout its flight
Question 12.
12. (TCO 1) A bus starts from rest and accelerates at a rate of 9 m/s2
for 4 seconds, then decelerates (brakes) at a rate of -3 m/s2 for 2 seconds. How far did the bus travel in 6 s?
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