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Published byOwen Gardner
Modified over 3 years ago
September 24 AP physics
October 1 In: A 20 kg box is pushed 10 meters across a floor with a coefficient of friction of.5 with a force of 3000 N? How fast is it going at the end?
Objective: What is work? SC: Be able to solve work problems
Types of Energy: Work
Notes: Work=force x distance Force and distance must be in the same direction
Problem: A windmill pumps 200 kg of water a distance of 10 meters high. How much work did it do?
Problem: A boy picks up a 10 kg box 1 meter and carries it 20 meters to a shelf. The shelf is 2 meters high. After he puts it on the shelf, how much work did he do?
Problem: The same boy picked up the same box 2 meters, carried it 10 meters across a room and the put it on the 2 meter shelf. How much work was done?
Problem: The same boy picked up the same box 2 meters, carried it 40 meters across a room and then lowered it down and put it on a 1 meter shelf. How much work was done?
problem: A 10 kg box is pushed up a ramp with a incline of 30 o to a height of 10 meters. The distance up the ramp was 20 meters. What was the work done? 10 m 20 m
problem: A 10 kg box is picked up and set at the top the ramp, 10 meters high. What was the work done? 10 m 20 m
Problem: A suitcase is pushed at an angle of 30 o from the horizontal with a force of 10 N for a distance of 30 meters. How much work was done?
Turn to your neighbor Summarize what you have learned about work
Out: An excavator picks up a 1000 kg piece of conduit 5 meters high. How much work was done?
Energy, Work and Power. Energy Energy: the currency of the universe. Just like money, it comes in many forms! Everything that is accomplished has to be.
Work AP style. Energy Energy: the currency of the universe. Everything has to be “paid for” with energy. Energy can’t be created or destroyed, but it.
What is Work? In Science, Work is accomplished when a force is moved over a distance. Work. –Lifting books, pushing a box 2 feet, pulling a wagon. Not.
Indicate what effect the change will have on the acceleration.
Work- Mechanical Energy - To Do Work, Forces Must Cause Displacements frictionlessfrictionlessfrictionlessfrictionless.
Aim: How can we solve problems dealing with kinetic energy?
Unbalanced forces cause acceleration
Newton’s 2 nd Law Example with Angles! Consider a box of mass m being pulled across a rough horizontal floor with an applied force F A at 35 °. The coefficient.
Bellwork How much work is done by a tennis racket on a tennis ball if it exerts a horizontal force of 44 Newtons on a 0.25 kg ball from a height of 1.0.
Calculation of Gravitational P. E
Work done is the energy transferred when a force moves an object over a distance. Since work is energy transferred, the unit for work is the joule (J).
High School Part 1 /2 by SSL Technologies Physics Ex-44 Click PART-2 /2 THE INCLINED-PLANE The inclined-plane is a simple machine that multiplies the.
Physics Monkemeier. When a force is exerted on an object and the object experiences a change in position in the direction of the exerted force. Examples.
Work, Power, & Energy Chapter 12 and 13.
SPH3U Exam Review. Work 1. The work done on a system is equal to its change in: A. force B. energy C. power D. both B and C.
Exam Review Part 2 SPH4C. Question 1 Starting from rest, Jacob accelerates to a velocity of 4.6 m/s [E] in 2.0 s. (a) What was Jacob's acceleration?
A force of 15 newtons is used to push a box along the floor a distance of 3 meters. How much work was done in this situation?
Class Notes WPE Problems Equation Sheet
Work and Energy. Work a force that causes a displacement of an object does work on the object W = Fdnewtons times meters (N·m) or joules (J)
Question C1.01 Description: Eliciting prior conceptions about "work" and introducing the physics definition. Source: A2L: UMPERG-ctqpe50.
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