Acar travels 1.46 km in the x-direction, then turns left 74.8 ◦ to the original direction and travels an additional distance of 2.57 km. calculate the x component of the car's net displacement.

 The x component of the car's net displacement = 3.94 km

Explanation:

   A car travels 1.46 km in the x-direction, which means displacement = 1.46 i km.

  Then car turns left 74.8⁰ to the original direction and travels an additional distance of 2.57 km, which means displacement = 2.57 cos 74.8⁰ i +2.57 sin 74.8⁰ = (2.48 i + 0.67 j) km

  So total displacement = 1.46 i + 2.48 i + 0.67 j = (3.94 i + 0.67 j) km

  The x component of the car's net displacement = 3.94 km

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.