Science Mining I
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FREQUENTLY ASKED QUESTIONS
For any other study information see the brochure my Studies@Unisa. 9
SMI181Q/101/2013
12
CONCLUSION
We hope that you will enjoy this module and wish you success
13
ADDENDUM
ADDENDUM A: COMPULSORY ASSIGNMENTS FOR FIRST SEMESTER SEMESTER 1 Assignment 1 Due date: 08 March 2013 Assignment Unique number: 748509 (Students registered for the first semester only) Instruction In preparing for this assignment do not rely only on the study guide. This assignment consists of twenty (20) questions. 1. A 2.5-m ladder leans against a wall and makes an angle with the wall of 32° as shown in the figure. What is the height (h) above the floor where the ladder makes contact with the wall? [5]
1) 2) 3) 4) 5)
2.1 m 1.3 m 2.4 m 1.6 m 1.9 m
2. Carl Lewis set a world record for the 100.0-m run with a time of 9.86 s. If, after reaching the finish line, Mr. Lewis walked directly back to his starting point in 90.9 s, what is the magnitude of his average velocity for the 200.0 m? [5] 1) 2) 3) 4) 5) 10 1.10 m/s 1.98 m/s 5.60 m/s 10.1 m/s zero
SMI181Q/101/3/2013 3. A car is moving at a constant velocity when it is involved in a collision. The car comes to rest after 0.450 s with an average acceleration of 65.0 m/s2 in the direction opposite that of the car's velocity. What was the speed, in km/h, of the car before the collision? [5] 1) 2) 3) 3) 5) 29.2 km/h 144 km/h 44.8 km/h 80.5 km/h 105 km/h
4. A car accelerates from rest at point A with constant acceleration of magnitude a and subsequently passes points B and C as shown in the figure.
The distance between points B and C is x, and the time required for the car to travel from B to C is t. Which expression determines the average speed of the car between the points B and C? [5] 1) 2) 3) 4) 5) v2 2ax
v v x t xt v v 1 2 at 2 at 5. An elevator is moving upward with a speed of 11 m/s. Three seconds later, the elevator is still moving upward, but it's speed
FREQUENTLY ASKED QUESTIONS
For any other study information see the brochure my Studies@Unisa. 9
SMI181Q/101/2013
12
CONCLUSION
We hope that you will enjoy this module and wish you success
13
ADDENDUM
ADDENDUM A: COMPULSORY ASSIGNMENTS FOR FIRST SEMESTER SEMESTER 1 Assignment 1 Due date: 08 March 2013 Assignment Unique number: 748509 (Students registered for the first semester only) Instruction In preparing for this assignment do not rely only on the study guide. This assignment consists of twenty (20) questions. 1. A 2.5-m ladder leans against a wall and makes an angle with the wall of 32° as shown in the figure. What is the height (h) above the floor where the ladder makes contact with the wall? [5]
1) 2) 3) 4) 5)
2.1 m 1.3 m 2.4 m 1.6 m 1.9 m
2. Carl Lewis set a world record for the 100.0-m run with a time of 9.86 s. If, after reaching the finish line, Mr. Lewis walked directly back to his starting point in 90.9 s, what is the magnitude of his average velocity for the 200.0 m? [5] 1) 2) 3) 4) 5) 10 1.10 m/s 1.98 m/s 5.60 m/s 10.1 m/s zero
SMI181Q/101/3/2013 3. A car is moving at a constant velocity when it is involved in a collision. The car comes to rest after 0.450 s with an average acceleration of 65.0 m/s2 in the direction opposite that of the car's velocity. What was the speed, in km/h, of the car before the collision? [5] 1) 2) 3) 3) 5) 29.2 km/h 144 km/h 44.8 km/h 80.5 km/h 105 km/h
4. A car accelerates from rest at point A with constant acceleration of magnitude a and subsequently passes points B and C as shown in the figure.
The distance between points B and C is x, and the time required for the car to travel from B to C is t. Which expression determines the average speed of the car between the points B and C? [5] 1) 2) 3) 4) 5) v2 2ax
v v x t xt v v 1 2 at 2 at 5. An elevator is moving upward with a speed of 11 m/s. Three seconds later, the elevator is still moving upward, but it's speed