How Far Does a Car Travel After Driving Off a Cliff?

In summary, the problem involves a car being driven off a cliff with a horizontal velocity of 12.9 m/s and a vertical drop of 20.7 m. Using the given information and assuming upwards as the positive direction, the time for the car to reach the ground is calculated to be 3.757 seconds. Using this time, the horizontal displacement is found to be 48.5 m, which when added to the initial vertical displacement of 20.7 m, gives a total distance of 69.2 m from the base of the cliff to the point where the car strikes the ground. The approach of solving the x and y components separately is correct, but the initial vertical velocity should be considered as 0
  • #1
kingyof2thejring
82
0
In a film stunt, a car is driven off a cliff with a horizontal velocity of 12.9 ms-1. The cliff face is vertical, and the cliff is 20.7 m high. Calculate the distance in m from the base of the cliff to the point where the car strikes the ground.

should i be considering this problem in x and y - components of the motion separately.

taking upwards as +ve direction for vectors
displacment = -20.7
initial displacement = 0
inital speed = 12.9
a=-9.8

using it in s = ut + 1/2at^2 i get
20.7 + 12.9t - 4.9t^2
t = 3.757 +ve value taken

s=ut
12.9*3.757= 48.5m as the displacement
and then 48.5 + 20.7 = 69.2m for the distance.
help would be apprecated
thanks in advance
 
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  • #2
Only one mistake.

The horizontal velocity is 12.9 m/sec. There is no initial vertical velocity.

But, your overall approach of solving the x component and y component separately is right. Solve the y component to find the time. Use that time to solve the horizontal component.
 
  • #3
cheers!
 

FAQ: How Far Does a Car Travel After Driving Off a Cliff?

How do filmmakers make car stunts look realistic?

Filmmakers use a combination of special effects, camera angles, and skilled stunt drivers to make car stunts look realistic. They may also use computer-generated imagery to enhance the scene.

Is it dangerous for stunt drivers to perform car stunts?

Yes, car stunts can be dangerous for stunt drivers. However, they undergo extensive training and safety protocols to minimize the risks involved.

How do car crashes in films differ from real-life car crashes?

In films, car crashes are carefully choreographed and planned out, whereas real-life car crashes are unpredictable and often chaotic. Filmmakers also use special effects to enhance the impact and make it look more dramatic.

Can a car really jump over a gap or ramp like in films?

Yes, it is possible for a car to jump over a gap or ramp. However, in films, the distance and speed of the jump are often exaggerated for dramatic effect. Stunt drivers also use special techniques and modified cars to achieve these stunts.

Are there any laws or regulations regarding car stunts in films?

Yes, there are laws and regulations in place to ensure the safety of both the stunt drivers and the general public during car stunts. Filmmakers must obtain permits and follow strict guidelines set by the film industry and local authorities.

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