Question

Q: A dirt-biker is leaving a mud jump with a velocity of "v" at an angle of 0 above the horizontal. Air resistance is negligible. *Assume right and up are positive, and left and down are negative*

1 . After takeoff, what is the acceleration of the rider?

2. The verticle component of the rider's initial velocity is ...

a. VoSIN0 b.VoCOS0 c. -VoCOS0 d. -VoSIN0

3. At the highest point of the riders flight, the horizontal component of his velocity would be:

a. Vo b.VoCOS0. c. Vx=√ Vox-2gd d . not able to figure out

4. The landing ramp is at the same height as the launch jump. The final verticle component of the rider's velocity is...

a. Not enough info. b. dependent on the time of flight c.Same as final horizontal component d. the same as the initial component but opposite sign

5. During the flight, the rider's speed is ..

a. constant. b. constantly decreasing c. is = to d. is a min at the highest point in the flight

Answer 1

1 . After takeoff, what is the acceleration of the rider

9.8 m/s²

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2. The vertical component of the rider's initial velocity is

V_o sin

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3. At the highest point of the riders flight, the horizontal component of his velocity would be

V_o cos

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4. The landing ramp is at the same height as the launch jump. The final vertical component of the rider's velocity is

the same as the initial component but opposite sign

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5. During the flight, the rider's speed is

is a min at the highest point in the flight  

reason - at highest point, vertical component of velocity is zero.