A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway truck ramp that is inclined at an angle of 17.0° above the horizontal. The semi-trailer coasts to a stop after traveling 120 m along the ramp. What was the truck's initial speed? Neglect air resistance and friction.

26.2 m/s

Explanation:

We are given that

Distance traveled by truck =s=120 m

Final speed of  truck =v=0

We have to find the  initial speed of truck.

Where g=

Substitute the values

u=26.2 m/s

Hence, the initial velocity of truck=26.2 m/s

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."