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True [87]
2 years ago
11

A roller coaster car rapidly picks up speed as it rolls down a slope as it starts down the slope its speed is 4m/s but 3 seconds

later at the bottom of the slope its speed is 22m/s what is its average acceleration
Physics
1 answer:
Gwar [14]2 years ago
3 0

Answer:

The acceleration is 6 [m/s^2]

Explanation:

We can find the acceleration of the roller coaster using the kinematic equation for uniformly accelerated motion.

v_{f} =v_{i} + a*t\\where:\\v_{f} = final velocity = 22 [m/s]\\v_{i} = initial velocity = 4 [m/s]\\t = time = 3 [s]\\

Now replacing the values we have:

a=\frac{v_{f} - v_{i} }{t} \\a=\frac{22 - 4 }{3}\\a = 6 [m/s^{2} ]

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An object accelerates from rest and travels 53 m west in 5.2 s. Determine the acceleration
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20.4m/s²

Explanation:

Given parameters:

Initial velocity  = 0m/s

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Time  = 5.2s

Unknown:

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Solution:

This is a linear motion and we use the right motion equation;

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a is the acceleration

t is the time

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         a = \frac{53}{2.6}  = 20.4m/s²

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3 years ago
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