A train of length Lis moving on a straight track with a speed vo- The engineer applies the brakes at a crossing, and later the last car passes the crossing with a lower speed vf. Assuming constant acceleration, determine how long the train blocked the crossing. Disregard the width of the crossing.

Q: dx Væ(2 – x) ||

A: Formula-                    ∫ dx1-x2 =  sin-1x+C

Q: -6 a lo *10 c/8) Point isl2scm away from a -2o X 10 s (8 et e ト betwern that The MAJr

A:

Q: Please help answer this ques tion As soon as possible. Thanks! If possible within tle rext hour.

A: Given: F⇀=(105i^+46j^) θ=335° Introduction: Here rotation of co-ordinate system is taking place. The…

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A: Lagrangian L=T-VT=12m(x2.+y2.)V=mgy

Q: a stone is fired 50m/s at what angle should take the stone be fired to travel 100m horizantally ?

A: Given              initial velocity by which stone fired = u = 50 m/s            required horizontal…

Q: Yelena, Natasha, and the "Red Guardian" are looking for Melina's house. They walk 6.0 km [N], then…

A:

Q: The Harrington family belongs to a yacht club. On Saturdays they take their sailboat out in the bay.…

A: Kinematics.

Q: Can you show me the conversions for this question, of how you got 33.56 hours?

A: 31479714.567feets divided by , 1,088 feets per second is ,  31479714.567feets1,088 feets per second…

Q: Stetch the Planes (1T01), (1120) and (OTT)

A: The planes are given in the following images  The first two are for hexagonal system i.e (hkil)…

Q: prove that 1000Lb/inch =100kN/m

A: Consider the L.H.S of the given expression and convert from Lb/inch to kN/m.

Q: Write v = (-5, 12) as a product of its magnitude and a unit vec- tor in the direction of v.

A: Given Data: The vector v is given as, v=-5,12   The expression for the unit vector v is,…

Q: In figure (4), find the Req. between points A & B R R R= 1ose R R R R Fig.(4)

A: Recall For series connection Req=R1+R2+R3+......Rn for parallel connection.…

Q: ok i understand much better now but where did the 0.258 come from (multiplied to 17)

A: Moment of force

Q: 2 3 Which is the correct statement for location 3

A: Amplitude of a wave is the maximum displacement of wave on either side of equilibrium. Its SI units…

Q: A person walks 8 km due east, then 6 [km] due south, and finally 10 [km] due north-west (135 degree…

A: Given value--- A person walks 8 km due east, then 6 [km] due south, and finally 10 [km] due…

Q: 3. A surveyor measures the distance across a straight river by the following method. Starting…

A: This question can be solved by using very basic concepts of trigonometry. Distance from the tree to…

Q: S. V2 lok 2 Is るい.7n2 Is V3 10v

A: Given, Supply voltages are, Va=10VVb=5V And resistances are, R1=10kΩR2=10kΩR3=4.7kΩR4=10kΩ From…

Q: can you clear the answer in number 3 ?

A:

Q: Loop 2 Loop 1 -R1 R2 R3 (A DI4 (A2 V 1

A: The current in the direction of the loop is taken positive and that opposite to it is taken as…

Q: Compute the area of the region bounded by these parabolas. y = x2 – 4x + 3 and y = -x² + 2x + 3

A: Given: y=x2 -4x+3 y=-x2+2x+3

Q: How to covert 66,705 miles/hour to miles/second?

A: One hour is equal to 3600 seconds,

Q: x± iy= r sin Oe±iø

A:

Q: why did you do times 3.2?

A:

Q: As produ Close length

A: For a pipe closed at one end and open at the other a node forms at the closed end and an antinode…

Q: A train is moving with 72km/hr constant speed from one station to the other. The train is  50,000kg.…

A:

Q: Find the CG of the of area bounded by x/2+y/3+z/4=1 x=0, y=0, z=0

A:

Q: IS min tu to gu takes A train teCaving Stathun 7 gu 30 miles eust, than. min north and reuch Stanon…

A: Distance traveled to east = 30 miles time taken (t1) = 15 min Distance traveled to north = 60 miles…

Q: A boy was dropped, from a plane moving 100kph horizontally. If the height of the plane from the…

A:

Q: - 40. A 2.00-kilogram mass is at rest on a horizontal surface. The force exerted by the surface on…

A: Part (40): Given: The mass of the object is 2 kg.

Q: How did we get 1.72 here?

A: From the given solution force between the charges is F=940 N. F=940 Nkq1q2d2=940 N

Q: Find the Cartesian coordinates for the point whose distance from the origin is 7 m and the angle…

A:

Q: Given the point P(-0.4 m,0.5 m) in cartesian coordinates: 1. Write the position vector (including…

A: Position vector in form of Cartesian co - ordinates is given as vector component along x-axis and y-…

Q: + 60 -30 - 20 - 80 + 20 +60

A: A closed traverse with the meridian points that passing through the initial station, the double…

Q: If a radar unit measures that speed of an object 3 times and the results of 300km/hr, 297 km/hr, 302…

A:

Q: A rifle that shoots bullets with a muzzle speed of 1461 m/s is aimed at a target 807.0 m away. If…

A:

Q: Find the least count of a milliammeter in which there are 20 divisions between 400mA and 500mA.

A: The Least count = range/no.of divisions No. of divisions = 20

Q: A common unit for speed used in sailing is the knot (nautical miles per hour).  A nautical mile is…

A: Given, Speed of the boat VB = 22 knots Speed of the car: VC = 22 mph 1 knot = 1.15 mph ∴VB=22 knots…

Q: Find the (inverse) Matril of the next mutrik in two different ways A-() 3. ら

A:

Q: Calculate the magnitude of a x b when Jal = 12, |b| = 28 and the angle %3D %3D between a and b is 0…

A:

Scalars and Vectors

Scalars and Vectors are the classification of physical quantities that are used to denote various terms in physics.