Subjects

Sections | |||
---|---|---|---|

Intro to Energy | 15 mins | 0 completed | Learn |

Intro to Calculating Work | 36 mins | 0 completed | Learn |

Work By Gravity & Inclined Planes | 40 mins | 0 completed | Learn |

Work By Variable Forces (Springs) | 47 mins | 0 completed | Learn |

Net Work & Kinetic Energy | 39 mins | 0 completed | Learn |

More Work-Energy Problems | 39 mins | 0 completed | Learn |

Power | 20 mins | 0 completed | Learn |

Solution: A mass of 1kg begins at a position (–3 m, –4 m) at a speed of 4.6 m/s. If it moves in a straight line and ends up at a position (2.5 m, 3 m) at a speed of 3.2 m/s, how much work was done on the mass?

A mass of 1kg begins at a position (–3 m, –4 m) at a speed of 4.6 m/s. If it moves in a straight line and ends up at a position (2.5 m, 3 m) at a speed of 3.2 m/s, how much work was done on the mass? What is the net force acting on the mass?

A mass of 1kg begins at a position (–3 m, –4 m) at...

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A 16-kg sled starts up a 28 incline with a speed...

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An old oaken bucket of mass 6.75 kg hangs in a wel...

A 46 g particle is moving to the left at 21 m/s ....

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A factory worker pushes a 30.0 kg crate a distance...

Two blocks are connected by a very light string pa...

A 0.805-kg ball is tied to the end of a string of ...

You push your physics book 1.80 m along a horizon...

A batter hits a baseball with mass 0.150 kg strai...

An old oaken bucket of mass 6.75 kg
hangs in a ...

A woman stands in an elevator that has a constant ...

A 255 kg load is lifted 22.0 m vertically with a...

Use the work-energy theorem to solve each of these...

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rock vertically into the air...

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weight and th...

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A ball on a string travels once around a circle wi...

A baseball leaves a pitchers hand at a speed of e...

An 80 g arrow is fired from a bow whose string ex...

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A sled with mass
12.10 kg
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A small block with a mass of 0.0600 kg
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A 0.2 kg plastic cart and a 20 kg lead cart both r...

One end of a horizontal spring with force constant...

A block of ice of mass 4.10 kg is placed against ...

A
45 g
rock is placed in a slingshot and t...

You are asked to design spring bumpers for the wal...

A horizontal spring with spring constant 85 N/m
...

Chris jumps off a bridge with a bungee cord (a hea...

An elevator cable breaks when a 950 kg elevator i...

A 6.0-kg box moving at 5.0 m/s on a horizontal, f...

At a waterpark, sleds with riders are sent along a...

A car is stopped in a distance exttip{D}{D} by a ...

A car is stopped by a constant friction force that...

At an accident scene on a level road, investigator...

A train is moving along a track with constant spee...

A softball having a mass of 0.30 kg is pitched ho...

A 1.50 kg book is sliding along a rough horizonta...

A 91 kg crate, starting from rest, is pulled acro...

On an essentially frictionless, horizontal ice rin...

A
65 kg
softball player slides into second...

A 12-pack of Omni-Cola (mass 4.30 kg) is initially...

A little red wagon with mass 7.10 kg moves in a st...

How much work is required to stop an electron ( m ...

A car passenger buckles himself in with a seat bel...

A car is traveling on a level road with speed v0 a...

Your cat "Ms." (mass 7.00 kg) is trying to make it...

How much work is done by the horizontal force FP =...

Starting from rest, a crate of mass m is pushed up...

A cyclist starts from rest and coasts down a 6.0 ...

A block of ice with mass 2.00 kg
slides
1.6...

A box of mass 5.5 kg is accelerated from rest by a...

An 200g object initially at rest slides 50 cm down...

How much work must be done to stop a 1300 kg car t...

A 145 g baseball traveling 33 m/s moves a fielders...

A 51.0 kg crate, starting from rest, is pulled acr...

Susan's 12.0 kg baby brother Paul sits on a mat. S...

A 6.10 kg block is pushed 9.30 m up a smooth 38.0 ...

A soccer ball with mass 0.460 kg is initially movi...

A block of mass m = 2.50 kg is pushed a distance d...

A 500 kg elevator accelerates upward at 1.3 m/s2 f...

The figure shows the kinetic-energy graph for a 2....

A 400 g particle moving along the x-axis experienc...

A box with mass 5.00 kg is pulled up a 36.9° incli...

A 2.30-kg textbook is forced against a horizontal ...

A horizontal spring with spring constant 270 N/m i...

A 10 kg object slides down an incline of 30 o. If ...

Particle A has half the mass and eight times the k...

If the human body could convert a candy bar direct...

Use the work–energy theorem to solve each of these...

A truck has four times the mass of a car and is mo...

A crate of mass 10.0 kg is pulled up a rough incli...

Jonathan is riding a bicycle and encounters a hill...

Jonathan is riding a bicycle and encounters a hill...

An 80.0-kg skydiver jumps out of a balloon at an a...

An older-model car accelerates from 0 to speed v i...

An airplane of mass 1.50 x 104 kg is in level flig...

A 0.600-kg particle has a speed of 2.00 m/s at poi...

Review. In an electron microscope, there is an ele...

Review. You can think of the work–kinetic energy t...

Review. A 5.75-kg object passes through the origin...

A 40.0-kg box initially at rest is pushed 5.00 m a...

Review. A 7.80-g bullet moving at 575 m/s strikes ...

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