UNIVERSITY OF TOURISM, TECHNOLOGY AND BUSINESS STUDIESCE and CIS

1st and 2nd Years / Morning Engineering Physics

Lecturer: Jean Paul NIZEYIMANA

CAT 1 19th October 2015 Duration: 2hours

Instructions

- Answer all questions

- This quiz is closed book. The total mark is 20

1. The circumference of the Earth is roughly 40,233 km. What is the speed of the Earth’s rotation? (2 marks)

2. When an airplane takes off, it gains a speed of 250 km/hr in about 244 meters. What is the planes acceleration? (2 marks)

3. A rock is thrown straight upward off the edge of a balcony that is 5 m above the ground. The rock rises 10 m, then falls all the way down to the ground below the balcony. What is the rock's displacement? (3 marks)

4. A child walks 5 m east, then 3 m north, then 1 m east. a.) What is the magnitude of the child's displacement? (1 mark) b.) What is the direction of the child's displacement? (1 mark) c.) If the child completes his journey in 20 seconds, what is the magnitude of his average velocity? (2 marks)

5. A rock is dropped 80 meters from a cliff. How long does it take to reach the ground? (2 marks)

6. A tennis ball is thrown horizontally with an initial speed of 10 m/s. If it hits the ground after 4 seconds, how far did it drop before hitting the ground? (3 marks)

7. An object's position during a 10 second time interval is shown by the graph below:

(4 marks)