Work and Power Easy to hard!.

Slides:

Advertisements

Similar presentations

Practice Problem #1 A weightlifter bench presses 80kg (approx. 175lbs.) 0.75m straight up. a. How much work does she do, assuming constant velocity, in.

Advertisements

Unbalanced forces cause acceleration

Work and Power solutions.

FORCES The term force refers to the interaction of objects and their environment. All forces are exerted on one object by another object. Forces have both.

Newton’s Second Law of Motion

Physics – First Semester Review

High School by SSL Technologies Physics Ex-41 Click As you know, work is the product of force times the distance through which the force acts (W = Fs).

Warm Up 1. A rubber stopper is whirled in a 1 m circle with a velocity of 8 m/s. If it generates 1.28 N of centripetal force what is the mass of the stopper?

Forces & Motion – Test 1 Review. A push or pull that acts on an object.

Simple Machines. I. The simple machine A. Types of Simple Machines… 1. Lever 2. Pulley 3. Wheel and axle 4. Screw 5. Wedge 6. Inclined plane.

Topic 1Topic 2Topic 3Topic 4Topic

Work. Work – is a quantity that exist whenever a force acting upon an object causes a displacement. Displacement – a vector quantity, which refers to.

Energy and Work. Energy Energy is the ability to change or cause change. If something has no energy, there can be no change.

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?

Power Chapter What determines the amount of work done by an object? The force on the object times its displacement. Time does not affect the amount.

Speed, Momentum, Acceleration, Work, Power, and Potential Energy Practice Problems TEK I6A – describe the law of conservation of energy; and TEK I4A.

Work and Machines. What is a machine? A device that allows you to do work in a way that is easier and more effective.

A 9.0 kg object hangs on a string that can have a maximum tension of 275 N. What is the shortest time you could raise the object from rest a distance of.

Drills on WORK. An ice skater glides for two meters across ice.

1.A cyclist and her bike have a combined mass of 60.0 kg. She is able to cycle up a hill that changes her altitude by 4.00 x 10 2 m in 1.00 min. Calculate.

10/12 How could you show this relationship using a magic triangle?

MS. MORGAN Force. What is a Force? Something that changes the state of rest or the state of motion of an object. Can be a…. push or a pull Unit of measurement:

Unit 5: Energy Intro to energy notes. What is energy? Energy is the ability of a physical system to do work Energy takes many forms – The movement of.

F = ma F = Force m = Mass a = Acceleration. The Manned Manoeuvring Unit.

Physics Fall Practice Final Exam 25 Questions Time = Less than 30 minutes.

Intro to Forces and Motion Ms. Graettinger Physical Science.

Angled Work Physics.

Work, Power & Energy.

Physics Chapter 5: Work & Energy.

Friction Coefficient.

Work and Power.

Work, Power Problems Answers

Newton’s Second Law of Motion

Energy and Work.

Aim: How do we define power?

Section 1: Work, Power, and Machines

Section 1: Work, Power, and Machines

Mary pulls on a lawnmower parallel to the ground

Energy and Work.

Describing Motion Acceleration Motion and Forces Newton’s Laws of

Work and Energy.

Chapter 13: Work and Energy Physical Science Coach Mynhier.

Welcome 2014! What do you remember???.

Chapter 8 Rotational Equilibrium and Dynamics

How much work is done when a boy carries a 30N bag?

April 20, 2010 Explain why holding a large box is not considered work.

Potential Energy.

Work, Energy, and Power.

Work and Energy.

Power In which situation would you tire more quickly?

Chapter 7 Daily Questions

Newton’s Second Law Acceleration.

PHYSICS Jeopardy.

Work and Power.

Physical Science Work and Machines.

Work, Energy and Power.

Non-contact forces Forces between objects when they are not touching.

Starters Week 4-5 Tuesday

Work and Power Calculations

Newton’s Second Law Acceleration.

Energy, Work, and Power.

Work, Power, and Machines

Section 1: Work, Power, and Machines

Work done = Energy Changed

Force in Two Dimensions

Practice for FA5.2.

Which free body diagram best represents the forces on the mower?

What’s your nationality? Where are you from?

Section 1: Work, Power, and Machines

Presentation transcript:

Work and Power Easy to hard!

Equations you will need Work = Force x Distance Power = Work / Time Force = Mass x Acceleration

Problem 1 Jon lifted a trash can 2 meters in the air to dump it in the trash. He exerted 210N of force to lift it. How much work did Jon do to lift the can?

Problem 2 If Jon lifted the can in 2 seconds and his buddy lifted the same can the same height in 3 seconds, who had the most power?

Problem 3 In order for Mary to raise her sail on her sailboat she has to exert in average force of 30N on the rope. The sail moves up 12m and it takes her 20 seconds to lift it up completely. What was her power output?

Problem 4 Henry pushes his brother on his bike a distance of 12 meters in 4 seconds. If his brother and the bike have the mass of 80 kg and he accelerates at 1.2 m/s^2, what is Henry’s power output?

Problem 5 A man is pulling a 90000 g sled 0.15 km up a hill. What is his power output if it took him 1.5 minutes with an average force on the sled being 50N?