Keep the track tilted at 14° with the horizontal. Put the friction block on the track surface at the top of the track. Let the friction block slide downwards. The length of the track is 65 cm. Starting from zero speed at the top of the track, what will be the speed of the friction block as it reaches the bottom? Write your answer in m/s. Use Hk = 0.12 and mass of the friction block 400 grams.

Keep the track tilted at 14° with the horizontal. Put the friction block on the track surface at the top of the track. Let the friction block slide downwards. The length of the track is 65 cm. Starting from zero speed at the top of the track, what will be the speed of the friction block as it reaches the bottom? Write your answer in m/s. Use Hk = 0.12 and mass of the friction block 400 grams.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

3. Under normal conditions a tennis ball has a diameter of 6.6 cm, but when a 90 kg professor stands balanced on two identical tennis balls, each one compresses down to ½ its normal height. Modeling the tennis balls as springs, what is the spring constant of a oo tennis ball in N/m?
a. How much horsepower does a 25 W household lightbulb consume? (Express your answer using four significant figures.) 25 W =| hp b. How much kW does a 12 hp lawn mower engine produce? (Express your answer using four significant figures.) 12 hp = kW
. Figure 3 shows a circuit whose elements have the following values: 81=3.5 V, 82= 7.2 V, R1 = 1.85 2, dan R2 = 3.5 2. The three batteries are ideal batteries. Find the magnitude and direction of the current in each of the three branches.
At the playground, Logan slides down each of the frictionless slides shown. At the top, he is given a push so that he has the same initial speed each time. At the bottom of which slide is he moving the fastest? Slide A Slide B Slide C a. Slide A o b. All slide are the same O c. Slide B O d. Slide C
Which of the following statements about energy is not true? a. The mechanical energy of a physical system is constant when the forces acting on the system are all conservative forces. b. The total energy of the universe is always conserved. c. According to the work-energy theorem, the forces that contribute to the net work include all the conservative and nonconservative forces. d. Mechanical energy is always conserved e. Energy can change form, but it cannot be created or destroyed.
13. A 3000 kg car travelling at 10 m/s rolls down a steep driveway that has a vertical drop of 5.0 m. a) If we ignore friction, what is the car's speed at the bottom of the incline? b) If we include friction, and find that the heat generated along the driveway is 50 000 J, what is the speed of the car at the bottom of the incline?
Mountain climbers carry bottled oxygen when at very high altitudes, since the atmosphere contains less and less as you go higher up. a. Assuming that a mountain climber uses 3.92 liters of oxygen per minute, calculate how many liters of oxygen a climber would need for 11 h of climbing. (These are liters at sea level.) Note that only 40% of the inhaled oxygen is utilized; the rest is exhaled. b. How much useful work does the climber do, in joules, if he and his equipment have a mass of 97.5 kg and he gains 1150 m of altitude? c. What is his efficiency for the 11-h climb? Assume his total energy consumption is 1370 W.
Math Review e. Convert 48 miles per hour into m's™¹. f. Convert 3.056 yd² into m². (3 056 yet²) - (1 m) ² (10156 g. Convert 27.25 cm³ into L. 2 2.794 m² 8. A bushel of tomatoes weighs 53 pounds. What is the mass of 4.25 bushels of tomatoes in kilograms? 9. The original 1955 Ford Thunderbird was powered by a 292-in³ engine. What is this volume in liters? 10. A certain hybrid vehicle has a fuel economy of 53 mi/gal during city driving. What is this fuel economy in units of km/L? 11. The atmosphere exerts a pressure of approximately 4.7 lb/in² at the peak of Mount Everest. What is this pressure in units of kg/m²?
A 61.5-kg hiker starts at an elevation of 1200 m and climbs to the top of a peak 2750 m high. Part A What is the hiker's change in potential energy? Express your answer to three significant figures and include the appropriate units. ΔΡΕς = Submit Part B W min = Submit Part C What is the minimum work required of the hiker? Express your answer to three significant figures and include the appropriate units. O Yes O No Value Submit μA Request Answer ī μÅ Value Request Answer Units Can the actual work done be greater than this? Request Answer Units ? ?
Question has TWO parts Your answer needs to have 2 significant figure, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. Part A - A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic energy, in kJ (kiloJoules)? Part B - A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic power, in kW (kiloWatts)?
If you have a ball with a mass of 6.00kg, that has an initial velocity of vA=(2.00i + 5.00j)m/s and a final velocity of vB=(-2.00i + 8.00j)m/s, What is the Work done on the ball if the work only changes the kinetic energy? a. 234 Joules b. 117 Joules c. 93 Joules d. -13 Joules e. 95 Joules
You take a 13kg bag of lead pellets and drop it from 2m above the ground.a. How much gravitational potential energy does the bag have when held 2m above the ground?b. The bag is dropped. Just before it hits the ground, how much kinetic energy does it have?c. How fast is the bag moving just before it hits the ground?d. When it hits the ground, the kinetic energy will be transformed mostly into thermal energy. If 40%of this energy goes into the lead pellets as heat, what will be the increase in temperature of thelead? Assume led has a specific heat capacity of 160J/kg·K.