Tutoring Questions

et N A truck is cruising on a rural road when the driver notices a moose 54.0 m away blocking the road. "2~ ~-rer slams the brakes causing the truck to slow down at a constant rate of 3.90 m/s* for 4.90 s before coming in contact with the moose. a. What is the initial speed (in km/h) of the truck? b. Determine the speed (in km/h) of the truck as it hits the moose. c. Do you think the animal is seriously hurt in this accident?

A 108 m long train starts from rest (at ¢ = 0) and accelerates uniformly. At the same time, a car moving with constant velocity in the same direction is in line with the rear end of the train, as shown in Figure A1.06. At ¢t = 12.0s the car reaches the front end of the train. However, the train continues to speed up and pulls ahead of the car. At t = 30.0s, the car is left behind the train. Calculate a. the car's speed. b. the train's acceleration. t=230s i:l:l:l:ll:ll:]h t=12s - \:H:l!:l:l:l:l.d: t=20 -y i:ll:l:ll::fl:l‘- - - - - (m) 0 200 400 Figure A1.06 Aball is released from the top S°M°" ) m high building. At the same instant a second ball is shot straight up from the ground with an initial speed of 20.0m/s, directly below the point where the first ball was dropped. Ignore air drag and calculate a. the height above the ground where the balls collide. b. the velocity (magnitude and direction) of each ball just before the collision.

A section of a river is 252 m wide and the water flows east with a uniform velocity of 1.10m/s. A boat starts at point A on the south bank and crosses the river to point B on the opposite side, as shown in Figure A1.10. If the trip takes 3.00 min, find the velocity (magnitude and direction) of the boat with respect to a. a stationary observer on the ground. b. a floating duck moving with the water. B N i I | ! Uriver = 1.1m/s 1 | 1 I 1 Figure A1.10

I ScctionContent | A worker stands on the roof of a 45.0 m high building that is under construction. He throws a bag of debris giving it an initial velocity of 12.0m/s at an angle of 33.0° from downward direction. a. How long is the bag in flight? b. How far from the building does the bag land? c. What is the bag's final speed just before it hits the ground?

While rolling along a flat terrain at 48.0 km/h, a military tank fires its main cannon at 30.0° above the horizontal, as shown in Figure A1.13. The shell leaves the barrel with muzzle velocity of 480 m/s relative to the moving tank. Neglect air resistance and the height of the barrel above the ground. Do not neglect the speed of the tank. a. Calculate the maximum height of the shell above the ground. b. How long does it take the tank to arrive at the target hit by the shell? Figure A1.13

Three boxes (m; = 10.0kg, ms = 20.0kg, and m3 = 30.0kg) are in contact with each other on a frictionless horizontal surface. A horizontal force F' = 75.0 N is applied on mg3, as shown in Figure A1.14. Calculate, a. the acceleration of the system. b. the net force on each box. solution N€ boxes. c. the contact forces be Figure A1.14

@ Physics200. X @ College Physic X | O Course:Phys: x | O Physics200:1 x | O phys200-cou x | O phys200-cou x | ¥ PHYS200Lat x | [B] Studocu-Fre x | i Mail-Emmar x | + v & > C @ fst-course.athabascau.ca/science/phys/200/r7/course-materials/study-guide/assignment1/assign1.html#alq15 [UlR- *» =00 N Netfix M Gmail D Disneys © Mirosoft Offce H.. @ Mail- EmmaReid.. 5% Dalhousie Single.. [l Homepsge-Dalh.. € OneNote EJ Login @ Microsoft 365 AU @ Physics 200: ntro » & Unit5 < 16 17 18 “flab4 < @ Assignment 1 Assignment 1, Question 16 # Midterm Exam — &Unit6 A 4.00kg block slides on the surface of an inclined table, which makes an angle of s < 15.0° with the horizontal. The block is connected through cords over two pulleys to a 7.26 kg bowling ball on the upper side of the table, and a 3.00 kg ball on the lower &units 8 side, as shown in Figure A1.16. The pulleys are massless and frictionless, while the oLabs < coefficient of kinetic friction between the block and the table's surface is 0.470. a a. Draw a free-body diagram for each moving object. & Unito b. Determine the direction of motion and acceleration of the system. & nit 10 < c. Calculate the tension in each cord. “ilab6 E @ Assignment 2 # Final Exam Figure A1.16

@ Physics200. X @ College Physic X | O Course:Phys: x | O Physics200:1 x | O phys200-cou x | O phys200-cou x | R PHYS200Lat x | B Studocu-Fre x | i Mail-Emmar x | + v < C @ fst-course.athabascau.ca/science/phys/200/r7/course-materials/study-guide/assignmenti/assignl.htmi#aia17 o % * = 0@ (w N Netfix M Gmail D Disneys & MicrosoftOffice H.. @ Mail-Emma Reid.. BE Dalhousie Single... [H] Homepage - Dalh.. @ OneNote [ Login @ Microsoft 365 AU @ Physics 200: Intro » “iLab1 ‘ acceptable. If you have any questions, please contact your tutor. @ Lab2 < Bunits L Questions o lab3 < . o " " Click on each of the boxes below to display (or hide) the corresponding question. @ Unit4 < 1 2 3 4 5 6 7 8 9 0 1" 12 13 14 15 & Lnit5 b 16 17 18 i lab4 < @ Assignment 1 ( Midterm Exam it < . 2 o mlnte Aping pong ball, of mass 2.7 g and diameter 4.0 cm, is dropped from a 15-m high unit7 ¢ building. e g a. Estimate the ball's terminal velocity. b. At what speed would the ball hit the ground in the absence of air drag? flabs < & Unit9 < e & Unit 10 < “Elab6 < Report an error or make a suggestion (# Assignment 2 (# Final Exam solution Arod consists of a 30.0 cm long glass section glued to a 45.0 cm brass section, as shown in Figure A1.18. The rod has a uniform cross-sectional diameter of 1.00 cm. Calculate the total compression of the rod (in millimetres) when it is under a compressive force of magnitude F = 6,600 N. F Brass Glass F —_— [ e fe— 45cm | 30cm — Figure A1.18