# physics

posted by .

A motorcycle daredevil is attempting to jump across as many buses as possible (see the drawing). The takeoff ramp makes an angle è = 18.0° above the horizontal, and the landing ramp is identical to the takeoff ramp. The buses are parked side by side, and each bus is 2.74 m wide. The cyclist leaves the ramp with a speed of v = 30.0 m/s. What is the maximum number of buses over which the cyclist can jump?

• physics -

horizontal speed = u = constant = 30 cos 18 so find u

d = u T
so we need T (total time aloft) to know the horizontal distance, d in the air.

so how long in the air?
initial speed up = Vi = 30 sin 18
so find Vi

v = Vi - 9.8 t
at top v = 0 and t = T/2
so
T/2 = Vi/9.8
T = Vi /4.9
put that T back in d = u T to find how far it goes in the air

## Similar Questions

1. ### physic

1.What is the gravitational force between two trucks, each with a mass of 2.0 x 10^4 kg, that are 2.0 m apart?
2. ### physics

A Hollywood Daredevil plans to jump a canyon on a motorcycle. There is a 15 m drop and the horizontal distance originally planned was 60 m but it turns out the canyon is really 69.6 m across. If he desires a a 3.2 second flight time …
3. ### physics

A Hollywood Daredevil plans to jump a canyon on a motorcycle. There is a 15 m drop and the horizontal distance originally planned was 60 m but it turns out the canyon is really 69.6 m across. If he desires a a 3.2 second flight time …
4. ### Physics

A Hollywood daredevil plans to jump the canyon shown in the figure on a motorcycle. There is a 15. m drop and the horizontal distance originally planned was 60. m but it turns out the canyon is really 65.7 m across. If he desires a …
5. ### physics

(a) daredevil is attempting to jump his motorcycle over a line of buses parked end to end by driving up a 32° ramp at a speed of 4-0.0 m/s (14-4- km/h), How many buses can he clear if the top of the takeoff ramp is at the same height …
6. ### Physics

2. A person would like to jump over a river using a motorcycle and a ramp. The frictionless ramp is inclined at an angle of 42.5 degrees, has a length of 52 meters, and the motorcycle's engine produces a constant force of 915 Newton’s …
7. ### physics

A motorcycle daredevil is attempting to jump across as many buses as possible (see the drawing). The takeoff ramp makes an angle θ = 16.8° above the horizontal, and the landing ramp is identical to the takeoff ramp. The buses …
8. ### physics

A physics professor moonlights as a daredevil jumping things on a motorbike. His next stunt will be to jump the oldman river on his motorcycle. The ramp is being built 100 m above the river and made an angle of 50.0 o relative to the …
9. ### physics

A physics professor moonlights as a daredevil jumping things on a motorbike. His next stunt will be to jump the oldman river on his motorcycle. The ramp is being built 100 m above the river and made an angle of 50.0 o relative to the …
10. ### Physics

A Dare daredevil wants to jump his motorcycle across a 50 m Canyon a) If his speed is 30m/s and a ramp angle is 50 degrees where should the landing ramp be placed?

More Similar Questions