Physics

A 1.8 tonne railway truck moving at a speed of 3m/s up a steady incline comes to a stop after 45m. If the sum of the friction opposing the truck amounts to 80N What is the angle of elevation of the slope?

I found Fg using m*g
THen I tried using v^2=u^2 + 2as to find the acceleration so I could find Fnet and then use that to find the !@#$%^&plied
Adding that to the friction of 80N (because it is in the same direction).
Then I thought to use trigonometry to solve for the angle only it didn'tt give me the correct answer...

Please could you help???

  1. 👍 0
  2. 👎 0
  3. 👁 203
asked by Random
  1. Wt. = 1.8 Tonne.
    Vo = 3 m/s.
    d = 45 m.
    Fk = 80 N.

    Mass = 1.8 * 1000kg = 1800 kg.

    Fg = m*g = 1800 * 9.8 = 17,640 N.

    KE + PE = mg*h-Fk*d
    KE + PE = mg*h-80*45
    0.5m*Vo^2 + 0 = mg*h-3600
    900*9 + 3600 = 17640h
    17,640h = 11,700
    h = 0.6633 m.

    sinA = h/d = 0.6633/45 = 0.01474
    A = 0.84o = Angle of elevation.

    1. 👍 0
    2. 👎 0
    posted by Henry
  2. WHAT DOES A DISPLACEMENT-TIME BALLON TYPE GRAPH REPRESENTS?

    1. 👍 0
    2. 👎 0
    posted by ANU

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A truck of mass 1.0 tonne moving at 4.0 m/s catches up and collides with a truck of mass 2.0 tonne moving at 3.0m/s in the same direction. The trucks become coupled together. Calculate their common velocity

    asked by lalala on January 20, 2014
  2. physics

    A truck of mass 8912 kg moving at a speed of 66.7 mph has lost its brakes. Fortunately, the driver finds a runaway lane, a gravel-covered incline that uses friction to stop a truck in such a situation; see the figure. In this

    asked by Anonymous on October 5, 2014
  3. Physics

    A truck of mass 9212 kg moving at a speed of 73.2 mph has lost its brakes. Fortunately, the driver finds a runaway lane, a gravel-covered incline that uses friction to stop a truck in such a situation; see the figure. In this

    asked by Em on February 19, 2011
  4. physics

    A railway track travelling along a level at 9 m/s collides with, and becoms coupled to a stationary truck. Find the velocity of the coupled trucks immediately after the collision if the stationary truck has a mass which is : A )

    asked by Nelly on February 23, 2011
  5. physics

    A railway truck on a level, straight track is initially at rest. The truck is given a quick, horizontal push by an engine so that it now rolls along the track. push from engine railway truck v = 4.3 m s–1 The engine is in

    asked by Anonymous on January 14, 2018
  1. Geometry

    The grade of a road or a railway road bed is the ratio rise/run, usually expressed as a percent. For example, a railway with a grade of 5% rises 5 ft for every 100 ft of horizontal distance. 1. The Johnstown, Pennsylvania,

    asked by Stacey on April 15, 2013
  2. physics

    A car moving at a speed of approximately 176.5 km/h. 923 m in front of the car, there is a truck moving at a speed of 84.2 km/h in the same direction. 1.What is the name of the physical process that would occur if both vehicles

    asked by Sandhya on December 2, 2008
  3. physics

    A truck travels up a hill with a 7.2◦ incline. The truck has a constant speed of 19 m/s. What is the horizontal component of the truck’s velocity? Answer in units of m/s.

    asked by Brianna on September 18, 2010
  4. physics

    A truck travels up a hill with a 13◦ incline. The truck has a constant speed of 18 m/s. What is the horizontal component of the truck’s velocity? Answer in units of m/s

    asked by Anonymous on October 1, 2015
  5. physics

    A truck travels up a hill with a 12◦ incline. The truck has a constant speed of 25 m/s. What is the horizontal component of the truck’s velocity? Answer in units of m/s.

    asked by Billy Johnson on September 16, 2019

More Similar Questions