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3 years ago

If a car rolls gently off a vertical cliff, how long does it take to reach 85 km/h?

Physics

1 answer:

irga5000 [103]3 years ago

8 0

The car takes 2.41 seconds to reach a velocity of 85 km/h

Explanation:

If the car is moving along a vertical cliff, it means that its motion is a free fall motion, which is a uniformly accelerated motion. Therefore, we can use the following suvat equation:

$v=u+at$

where:

v is the final velocity

u is the initial velocity

$a=g=9.8 m/s^2$ is the acceleration of gravity

t is the time

For the car in this problem:

u = 0 is the initial velocity

$v=85 km/h \cdot \frac{1000}{3600}=23.6 m/s$ is the final velocity

Solving for t, we find the time the car needs to reach this velocity:

$t=\frac{v-u}{a}=\frac{23.6-0}{9.8}=2.41 s$

Learn more about free fall motion here:

brainly.com/question/1748290

brainly.com/question/11042118

brainly.com/question/2455974

brainly.com/question/2607086

#LearnwithBrainly

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If a car rolls gently off a vertical cliff, how long does it take to reach 85 km/h?​

If a car rolls gently off a vertical cliff, how long does it take to reach 85 km/h?