You and your friends decide that it would be fun to push a rusty old mining cart down a track. If you push it at 3.1 m/s and friction causes it to accelerate at -0.3 m/s², how long will it roll before it stops?

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Related Questions

The gravitational strength on Earth is less than the gravitational strength on Jupiter. What will happen to a satellite when it travels from Earth to Jupiter? a Its mass will increase. b Its mass will decrease. c Its weight will increase. d Its weight will decrease.
Among types of research, only _______ can establish causality
Describe the difference between a conductor and an insulator in terms of thermal energy transfer and provide an example of each.
PLZ EXPLAIN THE EQUATION AND I WILL GIVE BRAINLIST You are out and about in the country and your father sees a rock that he really wants in the yard. Now you must get the very heavy rock into the back of a truck. The truck bed is 3 feet off the ground. Your father pulls out a 5-foot plank and begins to set up a ramp. At the same time, you (who know about mechanical advantage!) have found a plank that is 8 feet long, and you show it to your father. Which plank will give you the most mechanical advantage? Calculate the MA for each plank
Different velocity-time graph lines are shown, displaying the behavior of multiple race carts along a linear track.Which description correctly identifies cart C?A) Has a positive acceleration and is speeding up. B) Moving with zero acceleration. C) Moving at a constant acceleration. D) Has a negative acceleration and is slowing down.

Select all that apply. _____ is a place where the crust of the lithosphere has fractured. A fault A subduction zone An oceanic trench A river

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A fault? yes !A fault is a fracture with a significant rock mass movement as a result.

A subdution zone? No, although it is a place where the tectonic place meet (so are likely to fracture, but do not necessarily need to fracture).

An oceanic trench? No, although a trench does mark where the tectonic plates meet

A river? no!

The only right answer from these available options is a fault.

After tasting the salt in the ocean water on a visit to the beach one day, you recall from class that the salt is the __________ in the ocean water. A. solid
B. solute
C. solution
D. solvent

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Solid is a stateof matter having no space in a volume, made entirely of compact material.
Solute is adissolved substance is a dissolved substance in a solution.Solution is theone that dissolves the solute.
Solvent is theone that dissolves either a solution or solute.
Based on thedefinitions, the answer is letter B. solute.

Answer:

B. Solute

Explanation:

I've taken this on USATestPrep

Why is it useful to create neptunium by bombarding uranium with protons even though neptunium disintegrates in about two days?

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Answer;

Neptunium breaks down to produce plutonium used in bombs and americium.
it is also used in smoke detectors

Explanation;

Neptunium may be made by bombarding uranium with neutrons. However Neptunium atoms disintegrate to form plutonium.

Neptunium is useful. When Neptunium is bombarded with neutrons it is used to produce plutonium-238 which is used for spacecraft generators and terrestrial navigation beacons.
Plutonium used in bombs and americium. it is also used in smoke detectors.
Additionally, Neptunium is used in neutron detection equipment.

A car of mass m accelerates from speed v_1 to speed v_2 while going up a slope that makes an angle theta with the horizontal. The coefficient of static friction is mu_s, and the acceleration due to gravity is g. Find the total work W done on the car by the external forces.

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Answer:

Work done by external force is given as

$Work_(external) = mgLsin\theta + \mu mgLcos(\theta) + (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

Explanation:

As per work energy Theorem we can say that work done by all force on the car is equal to change in kinetic energy of the car

so we will have

$Work_(external) + Work_(gravity) + Work_(friction) = (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

now we have

$W_(gravity) = -mg(Lsin\theta)$

$W_(friction) = -\mu mgcos(\theta) L$

so from above equation

$Work_(external) - mgLsin\theta - \mu mgLcos(\theta) = (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

so from above equation work done by external force is given as

$Work_(external) = mgLsin\theta + \mu mgLcos(\theta) + (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

The process of a liquid becoming a gas is call what

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Vaporization of a sample of liquid is a phase transition from the liquid phase to the gas phase.

A freight train completes its journey of 150 miles 1 hour earlier if its original speed is increased by 5 miles/hour. Give the original speed of the train. a. 20 miles/hour b. 25 miles/hour c. 30 miles/hour d. 35 miles/hour

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The answer is B

If we assign speed variable x; and time variable y; then;

xy=150

(y-1) (x+5) = 150

xy + 5y - x – 5 = 150

(remember xy = 150), therefore;

5y – x = 5

X = 25

Y = 6

150(x+5)-150x=x(x+5)
150x+750-150x=x^2+5x
x^2+5x-750=0
(x-25)(x+30)=0
x=25

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