Subjects

Sections | |||
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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: Susan's 12.0 kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30 degrees above the floor. The tension is a constant 31.0 N {
m N}and the coefficient

Susan's 12.0 kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30 degrees above the floor. The tension is a constant 31.0 N { m N}and the coefficient of friction is 0.200. Use work and energy to find Paul's speed after being pulled 3.10 m.

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

The horizontal force FP = 150 N force pushes the ...

A gardener pushes a 16 kg
lawnmower whose han...

An 8.1 kg crate is pulled 5.1 m up a 30 incline ...

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

Proper design of automobile braking systems must a...

You are a member of an Alpine Rescue Team and must...

In the following figure assume that there is no fr...

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 ....

A factory worker pushes a crate of mass 30.1 kg a...

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...

You throw a 3.00-N
rock vertically into the air...

In the Bohr model of the atom, the ground-state el...

A cable with 21.0 N of tension pulls straight up ...

A pile driver lifts a
350 kg
weight and th...

The gravitational attraction between two objects w...

Youre fishing from a tall pier and have just caugh...

A ball shot straight up with kinetic energy K0 rea...

You throw a 5.5 g
coin straight down at 4.0 m/s...

The figure shows how the force exerted by the str...

How many joules of kinetic energy does a 750-kg au...

The mass of a proton is 1836 times the mass of an ...

On April 13, 2029 (Friday the 13th!), the asteroid...

The space shuttle Endeavour, with mass 86400 kg, i...

Compute the kinetic energy, in joules, of an autom...

T. Rex. The dinosaur Tyrannosaurus rex is thought ...

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Which has the larger kinetic energy, a 10 g bulle...

If the kinetic energy of a particle is tripled, by...

At what speed does a 1600 kg compact car have the...

A mother has four times the mass of her young son....

One car has twice the mass of a second car, but on...

A 3.0 g locust reaches a speed of 3.0 m/s during...

A 33.0 kg crate is initially moving with a veloci...

If a particles speed increases by a factor of 5, b...

One mole (6.022310J atoms) of helium atoms in the ...

Adult cheetahs, the fastest of the great cats, hav...

About 50000 years ago, a meteor crashed into the e...

A moving electron has kinetic energy K1 . After a ...

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...

A 53.0 kg ice skater is gliding along the ice, he...

The barrels of the 16-in. guns (bore diameter = 1...

When it is burned, 1 gallon of gasoline produces 1...

In the game of paintball, players use guns powered...

A sled with mass
12.10 kg
moves in a stra...

A small block with a mass of 0.0600 kg
is attac...

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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