### Why the kinetic frictional force is zero

Assignment Help Physics
##### Reference no: EM1387552

Q. A 1x10^2-kg crate is being pushed across a horizontal floor by a force that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.25. What must be the magnitude of, so that the net work completed by it and the kinetic frictional force is zero?

### Previous Q& A

#### Fuel economy calculations to be altered

In an article entitled "Fuel Economy Calculations to Be Altered," James R. Healey indicated that the government planned to change how it calculates fuel economy for new cars and trucks.

#### Middle of counseling sessions

Critically discuss the ethical concerns when expectations and or ground rules are changed in the middle of counseling sessions? Critically discuss the possible consequences for the client and or provider when this happens?

#### A company is negotiating with a potential supplier

A company is negotiating with a potential supplier for the purchase of 100,000 widgets. The company estimates the suppliers variable costs are \$5 per unit and that the fixed costs

#### Recommend a possible explanation

Codons with U or C as the second nucleotide, for example, tend to specify hydrophobic amino acids. Can you recommend a possible explanation for this phenomenon in terms of the early evolution of the protein synthesis machinery?

#### What is the intensity level

A loudspeaker at a rock concert generates 10-2 W/m2 at 18 m at a frequency of 1 kHz. Suppose that speaker spreads its energy uniformly in all directions. What is the intensity level at 18.00m.

#### Java application to display multiple choice questions

Write down the application which displays series of TEN(10) multiple choice questions: questions must cover all the Java. Each question must have four possible answers and only one answer must be correct.

through better purchasing, the cost of purchases was reduced to 43% of sales.

#### Does the non-coulomb electric field curl clockwise

does the non-Coulomb electric field curl clockwise.

#### Binomial distribution in an appropriate model

In each of the following cases, decide whether or not a binomial distribution is an appropriate model, and give your reasons.

#### Financial reporting and analysis

Prepare a trial balance at January 31, 2012, in the trial balance columns of the worksheet. Complete the worksheet using the following additional information and Prepare and post adjusting and closing entries.

### Similar Q& A

#### Find the distance between the train and the musician

Suppose a train engineer is climbing a vertical ladder at a speed of 0.2m/s while the train is slowly coasting east at 0.70 m/s. Find out the vector of the engineer relative to the ground in rectangular notation.

#### Determine the magnitude of the butterflys displacement

A .300kg mass attached to the end of a .75m string is whirled around on a smooth level table. If the maximum tension that the string can withstand is 250N, then what most tangential speed can the mass have if the string is not to break.

#### What is the speed of lander just before it touches surface

Three astronauts, propelled by jet backpacks, push and guide a 114 kg asteroid toward a processing dock, exerting the forces, with F1 = 32 N, F2 = 52 N, F3 = 39 N, θ1 = 30°, and θ3 = 60°. What is the (a) magnitude and (b) angle (measured relative ..

#### Determine the altitude as she crosses the bar

A uniform plank of length 5 m and weight 231 N rests horizontally on two supports, with d = 1.43 m of the plank hanging over the right support. To what distance, x, can a person who weighs 446 N walk on the overhanging part of the plank before it ..

A cart of mass 6.8 kg is moving with a velocity of 15.2 m/s. It makes a head-on perfectly inelastic collision with a stationary cart B with mass 6.4 kg causing them to travel with the velocity 7.63 m/s. What is the velocity of cart B.

#### Find out the horizontal distance

Three children each of weight 356N make a long raft by lashing together logs of diameter 0.30m and length 1.8m. how many logs will be needed to keep them afloat in fresh water. take density of the logs to be 800kg/m^3.

#### What does dissipate mean

If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 2.2 m on Earth, what would be his maximum range on the Moon, where free-fall acceleration is g/6 and g = 9.80m/s2.

#### Give the nature and location of the image

The resistor is connected in series with total set of lightbulbs. What is the value of the resistance? What is the power loss in the resistor.

#### Find out the final angular velocity of the system

A runner of mass m runs around the edge of the horizontal turntable mounted on a vertical, frictionless axis through its center. The runner's velocity relative to earth has magnitude v.

#### How high does it rise above the point of release

An airplane is flying with a velocity of 93.0 m/s at an angle of 22.0^circ above the horizontal. When the plane is a distance 119 m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.

#### What is the bubbles diameter

An antitank weapon fires a 3.00 kg rocket which acquires a speed of 50m/s after travelling 90cm down a launching tube. Assume the rocket was accelerated uniformly, what force acted on it.

#### A carnot engine operates between the reservoir

Heat Q flows spontaneously from a reservoir at 445 K into a reservoir at 265 K. Because of the spontaneous flow, 2620 J of energy is rendered unavailable for work when a Carnot engine operates between the reservoir at 265 K and a reservoir at 248 K. ..

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!