TOPIC 1 Review 1. Classify the levers in the illustrations as Class 1, Class 2, or Class 3. 2. How much work, in joules, must you do to lift an elephant weighing 60 000 N up 1.5 m onto the back of a truck? 3. You have found a ramp to lead up to the back of the truck. Will you and your team need to exert more, less, or the same forces as in question 2? 4. If you exert a force of 100 N on a hockey stick, and the stick exerts a force of 20 N on the puck, what is the mechanical advantage of the stick? 5. If the "effort arm" distance for the hockey stick in question 4 (between your "fulcrum" hand and your pushing hand) is 25 cm, how long is the stick? (Use your answer to question 4.) If your hand is pushing at a speed of 20 km/h, how fast will the puck move?

TOPIC 1 Review 1. Classify the levers in the illustrations as Class 1, Class 2, or Class 3. 2. How much work, in joules, must you do to lift an elephant weighing 60 000 N up 1.5 m onto the back of a truck? 3. You have found a ramp to lead up to the back of the truck. Will you and your team need to exert more, less, or the same forces as in question 2? 4. If you exert a force of 100 N on a hockey stick, and the stick exerts a force of 20 N on the puck, what is the mechanical advantage of the stick? 5. If the "effort arm" distance for the hockey stick in question 4 (between your "fulcrum" hand and your pushing hand) is 25 cm, how long is the stick? (Use your answer to question 4.) If your hand is pushing at a speed of 20 km/h, how fast will the puck move?

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

How much work is done against gravity to move an 800 kg weather monitor 300 km into the air? (re = 6.38 × 10® m, Me = 5.98 × 1024
You go for a walk one afternoon down a level street to a park where there is a hill. If the hill is 62 meters above street level and 4.6 km from home , how much work in the physics sense do you do in order to get to the top of the hill? Assume your mass is 65 kg and the acceleration of gravity is 9.8 m/s. Give your answer in joules (J).
You are out on the road with your friends, when you suddenly run out of gas. You and your friends apply a cumulative force of 103 N to push the car 96 m to the nearest gas station. What is the work done on the car?
A 50 N force is applied at an angle to the side of a box causing it to slide across a floor. The total work done to move the box 10m is 150 J (joules). A) what is the angle at which the force was applied? B) if the box has a weight of 735 N, what is the mass of the box?
A 1000-kg automobile accelerates up a hill, increasing its speed from 5 mi/h to 50 mi/h, along a straight 100-m stretch of road. If the hill makes an angle of 5° with respect to the horizontal, find the total work done by the automobile.
A bucket of water of mass 15 kg is pulled at constant velocity up to a platform 55 meters above the ground. This takes 8 minutes, during which time 8 kg of water drips out at a steady rate through a hole in the bottom. Find the work needed to raise the bucket to the platform. (Use g = 9.8m/s².) = Work = |
A bicyclist plus his bike weighs 80 kg. For the length of a 2-mile long hill, the bicyclist can do 250 W of useful work. How long will it take him to ride uphill given that the hill is inclined at 4 degrees?
An electric elevator with a motor at the top has a multistrand cable weighing 4 Ib / ft. When the car is at the first floor, 140 ft of cable are paid out, and effectively 0 ft are out when the car is at the top floor. How much work does the motor do just lifting the cable when it takes the car from the first floor to the top? The amount of work required is ft-lb. (Simplify your answer.)